to observe
Regular verb: observe - observed- observed

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I observe
you observe
he observes
we observe
you observe
they observe 	I'mobserving
you'reobserving
he'sobserving
we'reobserving
you'reobserving
they'reobserving	I observed
you observed
he observed
we observed
you observed
they observed	Iwasobserving
youwereobserving
hewasobserving
wewereobserving
youwereobserving
theywereobserving	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've observed
you've observed
he's observed
we've observed
you've observed
they've observed	I'vebeen observing
you'vebeen observing
he'sbeen observing
we'vebeen observing
you'vebeen observing
they'vebeen observing	I'd observed
you'd observed
he'd observed
we'd observed
you'd observed
they'd observed	I'd been observing
you'd been observing
he'd been observing
we'd been observing
you'd been observing
they'd been observing	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll observe
you'll observe
he'll observe
we'll observe
you'll observe
they'll observe 	I'll be observing
you'll be observing
he'll be observing
we'll be observing
you'll be observing
they'll be observing	I'll have observed
you'll have observed
he'll have observed
we'll have observed
you'll have observed
they'll have observed	I'll have been observing
you'll have been observing
he'll have been observing
we'll have been observing
you'll have been observing
they'll have been observing	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I'd observe
you'd observe
he'd observe
we'd observe
you'd observe
they'd observe 	I'd be observing
you'd be observing
he'd be observing
we'd be observing
you'd be observing
they'd be observing	I'd have observed
you'd have observed
he'd have observed
we'd have observed
you'd have observed
they'd have observed	I'd have been observing
you'd have been observing
he'd have been observing
we'd have been observing
you'd have been observing
they'd have been observing	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to observe 	 	observe
Let's observe
observe 	 	

Participle 	
Present 	Past 	 	 	
observing	observed