English verb conjugation
TO INVESTIGATE

Regular verb: investigate - investigated - investigated

Indicative

Present	Present continuous	Preterite	Preterite continuous
don't I investigate? don't you investigate? doesn't he investigate? don't we investigate? don't you investigate? don't they investigate?	am I not investigating? aren't you investigating? isn't he investigating? aren't we investigating? aren't you investigating? aren't they investigating?	didn't I investigate? didn't you investigate? didn't he investigate? didn't we investigate? didn't you investigate? didn't they investigate?	wasn't I investigating? weren't you investigating? wasn't he investigating? weren't we investigating? weren't you investigating? weren't they investigating?
Present perfect	Present perfect continuous	Pluperfect	Pluperfect continuous
haven't I investigated? haven't you investigated? hasn't he investigated? haven't we investigated? haven't you investigated? haven't they investigated?	haven't I been investigating? haven't you been investigating? hasn't he been investigating? haven't we been investigating? haven't you been investigating? haven't they been investigating?	hadn't I investigated? hadn't you investigated? hadn't he investigated? hadn't we investigated? hadn't you investigated? hadn't they investigated?	hadn't I been investigating? hadn't you been investigating? hadn't he been investigating? hadn't we been investigating? hadn't you been investigating? hadn't they been investigating?
Future	Future continuous	Future perfect	Future perfect continuous
won't I investigate? won't you investigate? won't he investigate? won't we investigate? won't you investigate? won't they investigate?	won't I be investigating? won't you be investigating? won't he be investigating? won't we be investigating? won't you be investigating? won't they be investigating?	won't I have investigated? won't you have investigated? won't he have investigated? won't we have investigated? won't you have investigated? won't they have investigated?	won't I have been investigating? won't you have been investigating? won't he have been investigating? won't we have been investigating? won't you have been investigating? won't they have been investigating?

Conditional

Present	Present continuous	Past	Past continuous
wouldn't I investigate? wouldn't you investigate? wouldn't he investigate? wouldn't we investigate? wouldn't you investigate? wouldn't they investigate?	wouldn't I be investigating? wouldn't you be investigating? wouldn't he be investigating? wouldn't we be investigating? wouldn't you be investigating? wouldn't they be investigating?	wouldn't I have investigated? wouldn't you have investigated? wouldn't he have investigated? wouldn't we have investigated? wouldn't you have investigated? wouldn't they have investigated?	wouldn't I have been investigating? wouldn't you have been investigating? wouldn't he have been investigating? wouldn't we have been investigating? wouldn't you have been investigating? wouldn't they have been investigating?

Infinitive

Imperative

Infinitive		Imperative
to investigate		- - -

Participle

Present	Past
investigating	investigated