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