1 is watching/isn't watching 现在进行时
2 was watching/wasn't watching 过去进行时
3 doesn't watch 一般现在时
4 didn't watch 一般过去时
5 will watch/won't watch 一般将来时
6 would watch/wouldn't watch 过去将来时
7 has watched/hasn't watched 现在完成时
8 had watched/hadn't watched 过去完成时