I don't observe you don't observe he doesn't observe we don't observe you don't observe they don't observe
Present continuous
I'm not observing you aren't observing he isn't observing we aren't observing you aren't observing they aren't observing
Preterite
I didn't observe you didn't observe he didn't observe we didn't observe you didn't observe they didn't observe
Preterite continuous
I wasn't observing you weren't observing he wasn't observing we weren't observing you weren't observing they weren't observing
Present perfect
I haven't observed you haven't observed he hasn't observed we haven't observed you haven't observed they haven't observed
Present perfect continuous
I haven't been observing you haven't been observing he hasn't been observing we haven't been observing you haven't been observing they haven't been observing
Pluperfect
I hadn't observed you hadn't observed he hadn't observed we hadn't observed you hadn't observed they hadn't observed
Pluperfect continuous
I hadn't been observing you hadn't been observing he hadn't been observing we hadn't been observing you hadn't been observing they hadn't been observing
Future
I won't observe you won't observe he won't observe we won't observe you won't observe they won't observe
Future continuous
I won't be observing you won't be observing he won't be observing we won't be observing you won't be observing they won't be observing
Future perfect
I won't have observed you won't have observed he won't have observed we won't have observed you won't have observed they won't have observed
Future perfect continuous
I won't have been observing you won't have been observing he won't have been observing we won't have been observing you won't have been observing they won't have been observing
Conditional
Present
I wouldn't observe you wouldn't observe he wouldn't observe we wouldn't observe you wouldn't observe they wouldn't observe
Present continuous
I wouldn't be observing you wouldn't be observing he wouldn't be observing we wouldn't be observing you wouldn't be observing they wouldn't be observing
Past
I wouldn't have observed you wouldn't have observed he wouldn't have observed we wouldn't have observed you wouldn't have observed they wouldn't have observed
Past continuous
I wouldn't have been observing you wouldn't have been observing he wouldn't have been observing we wouldn't have been observing you wouldn't have been observing they wouldn't have been observing