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