To Investigate

Infinitive: to investigate
Gerund: investigating
Past participle: investigated
Simple past: investigated


Irregular forms
Auxilliary verb
Spelling change

Indicative

Present
I investigate I investigate
you investigate you investigate
he/she/it investigates he/she/it investigates
we investigate we investigate
they investigate they investigate
you investigate you investigate
I do not investigate I don't investigate
you do not investigate you don't investigate
he/she/it does not investigate he/she/it doesn't investigate
we do not investigate we don't investigate
they do not investigate they don't investigate
you do not investigate you don't investigate
Preterite
I investigated I investigated
you investigated you investigated
he/she/it investigated he/she/it investigated
we investigated we investigated
they investigated they investigated
you investigated you investigated
I did not investigate I didn't investigate
you did not investigate you didn't investigate
he/she/it did not investigate he/she/it didn't investigate
we did not investigate we didn't investigate
they did not investigate they didn't investigate
you did not investigate you didn't investigate
Future
I will investigate I'll investigate
you will investigate you'll investigate
he/she/it will investigate he/she/it'll investigate
we will investigate we'll investigate
they will investigate they'll investigate
you will investigate you'll investigate
I will not investigate I won't investigate
you will not investigate you won't investigate
he/she/it will not investigate he/she/it won't investigate
we will not investigate we won't investigate
they will not investigate they won't investigate
you will not investigate you won't investigate

Perfect

Present
I have investigated I've investigated
you have investigated you've investigated
he/she/it has investigated he/she/it's investigated
we have investigated we've investigated
they have investigated they've investigated
you have investigated you've investigated
I have not investigated I haven't investigated
you have not investigated you haven't investigated
he/she/it has not investigated he/she/it hasn't investigated
we have not investigated we haven't investigated
they have not investigated they haven't investigated
you have not investigated you haven't investigated
Past
I had investigated I'd investigated
you had investigated you'd investigated
he/she/it had investigated he/she/it'd investigated
we had investigated we'd investigated
they had investigated they'd investigated
you had investigated you'd investigated
I had not investigated I hadn't investigated
you had not investigated you hadn't investigated
he/she/it had not investigated he/she/it hadn't investigated
we had not investigated we hadn't investigated
they had not investigated they hadn't investigated
you had not investigated you hadn't investigated
Future
I will have investigated I'll have investigated
you will have investigated you'll have investigated
he/she/it will have investigated he/she/it'll have investigated
we will have investigated we'll have investigated
they will have investigated they'll have investigated
you will have investigated you'll have investigated
I will not have investigated I won't have investigated
you will not have investigated you won't have investigated
he/she/it will not have investigated he/she/it won't have investigated
we will not have investigated we won't have investigated
they will not have investigated they won't have investigated
you will not have investigated you won't have investigated

Continuous

Present
I am investigating I'm investigating
you are investigating you're investigating
he/she/it is investigating he/she/it's investigating
we are investigating we're investigating
they are investigating they're investigating
you are investigating you're investigating
I am not investigating I'm not investigating
you are not investigating you aren't investigating
he/she/it is not investigating he/she/it isn't investigating
we are not investigating we aren't investigating
they are not investigating they aren't investigating
you are not investigating you aren't investigating
Past
I was investigating I was investigating
you were investigating you were investigating
he/she/it was investigating he/she/it was investigating
we were investigating we were investigating
they were investigating they were investigating
you were investigating you were investigating
I was not investigating I wasn't investigating
you were not investigating you weren't investigating
he/she/it was not investigating he/she/it wasn't investigating
we were not investigating we weren't investigating
they were not investigating they weren't investigating
you were not investigating you weren't investigating
Future
I will be investigating I'll be investigating
you will be investigating you'll be investigating
he/she/it will be investigating he/she/it'll be investigating
we will be investigating we'll be investigating
they will be investigating they'll be investigating
you will be investigating you'll be investigating
I will not be investigating I won't be investigating
you will not be investigating you won't be investigating
he/she/it will not be investigating he/she/it won't be investigating
we will not be investigating we won't be investigating
they will not be investigating they won't be investigating
you will not be investigating you won't be investigating

Continuous Perfect

Present
I have been investigating I've been investigating
you have been investigating you've been investigating
he/she/it has been investigating he/she/it's been investigating
we have been investigating we've been investigating
they have been investigating they've been investigating
you have been investigating you've been investigating
I have not been investigating I haven't been investigating
you have not been investigating you haven't been investigating
he/she/it has not been investigating he/she/it hasn't been investigating
we have not been investigating we haven't been investigating
they have not been investigating they haven't been investigating
you have not been investigating you haven't been investigating
Past
I had been investigating I'd been investigating
you had been investigating you'd been investigating
he/she/it had been investigating he/she/it'd been investigating
we had been investigating we'd been investigating
they had been investigating they'd been investigating
you had been investigating you'd been investigating
I had not been investigating I hadn't been investigating
you had not been investigating you hadn't been investigating
he/she/it had not been investigating he/she/it hadn't been investigating
we had not been investigating we hadn't been investigating
they had not been investigating they hadn't been investigating
you had not been investigating you hadn't been investigating
Future
I will have been investigating I'll have been investigating
you will have been investigating you'll have been investigating
he/she/it will have been investigating he/she/it'll have been investigating
we will have been investigating we'll have been investigating
they will have been investigating they'll have been investigating
you will have been investigating you'll have been investigating
I will not have been investigating I won't have been investigating
you will not have been investigating you won't have been investigating
he/she/it will not have been investigating he/she/it won't have been investigating
we will not have been investigating we won't have been investigating
they will not have been investigating they won't have been investigating
you will not have been investigating you won't have been investigating

Conditional

Present
I would investigate I would investigate
you would investigate you would investigate
he/she/it would investigate he/she/it would investigate
we would investigate we would investigate
they would investigate they would investigate
you would investigate you would investigate
I would not investigate I wouldn't investigate
you would not investigate you wouldn't investigate
he/she/it would not investigate he/she/it wouldn't investigate
we would not investigate we wouldn't investigate
they would not investigate they wouldn't investigate
you would not investigate you wouldn't investigate
Perfect
I would have investigated I would've investigated
you would have investigated you would've investigated
he/she/it would have investigated he/she/it would've investigated
we would have investigated we would've investigated
they would have investigated they would've investigated
you would have investigated you would've investigated
I would not have investigated I wouldn't have investigated
you would not have investigated you wouldn't have investigated
he/she/it would not have investigated he/she/it wouldn't have investigated
we would not have investigated we wouldn't have investigated
they would not have investigated they wouldn't have investigated
you would not have investigated you wouldn't have investigated

Imperative

(you) investigate (you) investigate
(we) let's investigate (we) let's investigate
(you) investigate (you) investigate
(you) do not investigate (you) don't investigate
(we) let's not investigate (we) let's not investigate
(you) do not investigate (you) don't investigate