to investigate
Regular verb: investigate - investigated- investigated

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I investigate
you investigate
she investigates
we investigate
you investigate
they investigate 	I'minvestigating
you'reinvestigating
she'sinvestigating
we'reinvestigating
you'reinvestigating
they'reinvestigating	I investigated
you investigated
she investigated
we investigated
you investigated
they investigated	Iwasinvestigating
youwereinvestigating
shewasinvestigating
wewereinvestigating
youwereinvestigating
theywereinvestigating	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've investigated
you've investigated
she's investigated
we've investigated
you've investigated
they've investigated	I'vebeen investigating
you'vebeen investigating
she'sbeen investigating
we'vebeen investigating
you'vebeen investigating
they'vebeen investigating	I'd investigated
you'd investigated
she'd investigated
we'd investigated
you'd investigated
they'd investigated	I'd been investigating
you'd been investigating
she'd been investigating
we'd been investigating
you'd been investigating
they'd been investigating	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll investigate
you'll investigate
she'll investigate
we'll investigate
you'll investigate
they'll investigate 	I'll be investigating
you'll be investigating
she'll be investigating
we'll be investigating
you'll be investigating
they'll be investigating	I'll have investigated
you'll have investigated
she'll have investigated
we'll have investigated
you'll have investigated
they'll have investigated	I'll have been investigating
you'll have been investigating
she'll have been investigating
we'll have been investigating
you'll have been investigating
they'll have been investigating	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I'd investigate
you'd investigate
she'd investigate
we'd investigate
you'd investigate
they'd investigate 	I'd be investigating
you'd be investigating
she'd be investigating
we'd be investigating
you'd be investigating
they'd be investigating	I'd have investigated
you'd have investigated
she'd have investigated
we'd have investigated
you'd have investigated
they'd have investigated	I'd have been investigating
you'd have been investigating
she'd have been investigating
we'd have been investigating
you'd have been investigating
they'd have been investigating	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to investigate 	 	investigate
Let's investigate
investigate 	 	

Participle 	
Present 	Past 	 	 	
investigating	investigated