to investigate
Regular verb: investigate - investigated- investigated

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
 don't I investigate?
don't you investigate?
doesn't she investigate?
don't we investigate?
don't you investigate?
don't they investigate? 	amI not investigating?
aren't you investigating?
isn't she investigating?
aren't we investigating?
aren't you investigating?
aren't they investigating? 	didn't I investigate?
didn't you investigate?
didn't she investigate?
didn't we investigate?
didn't you investigate?
didn't they investigate? 	wasn't I investigating?
weren't you investigating?
wasn't she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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