to investigate
Regular verb: investigate - investigated- investigated

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
 do I investigate?
do you investigate?
doesshe investigate?
do we investigate?
do you investigate?
do they investigate? 	amI investigating?
areyou investigating?
isshe investigating?
arewe investigating?
areyou investigating?
arethey investigating? 	did I investigate?
did you investigate?
did she investigate?
did we investigate?
did you investigate?
did they investigate? 	wasI investigating?
wereyou investigating?
wasshe investigating?
werewe investigating?
wereyou investigating?
werethey investigating? 	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
 have I investigated?
have you investigated?
hasshe investigated?
have we investigated?
have you investigated?
have they investigated? 	 have I been investigating?
have you been investigating?
hasshe been investigating?
have we been investigating?
have you been investigating?
have they been investigating? 	had I investigated?
had you investigated?
had she investigated?
had we investigated?
had you investigated?
had they investigated? 	had I been investigating?
had you been investigating?
had she been investigating?
had we been investigating?
had you been investigating?
had they been investigating? 	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
 will I investigate?
 will you investigate?
 will she investigate?
 will we investigate?
 will you investigate?
 will they investigate? 	 will I be investigating?
 will you be investigating?
 will she be investigating?
 will we be investigating?
 will you be investigating?
 will they be investigating? 	 will I have investigated?
 will you have investigated?
 will she have investigated?
 will we have investigated?
 will you have investigated?
 will they have investigated? 	 will I have been investigating?
 will you have been investigating?
 will she have been investigating?
 will we have been investigating?
 will you have been investigating?
 will they have been investigating? 	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
 would I investigate?
 would you investigate?
 would she investigate?
 would we investigate?
 would you investigate?
 would they investigate? 	 would I be investigating?
 would you be investigating?
 would she be investigating?
 would we be investigating?
 would you be investigating?
 would they be investigating? 	 would I have investigated?
 would you have investigated?
 would she have investigated?
 would we have investigated?
 would you have investigated?
 would they have investigated? 	 would I have been investigating?
 would you have been investigating?
 would she have been investigating?
 would we have been investigating?
 would you have been investigating?
 would they have been investigating? 	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to investigate 	 	-
-
- 	 	

Participle 	
Present 	Past 	 	 	
investigating	investigated