haven't hadn't

haven't hadn't don't doesn't didn't won't hasn't haven't hadn't 的用法 didn't和haven't什么有区别还有hadn't we -----seen each other since i finished middle school,用haven't还是hadn‘t i haven't been happy if i hadn't met you befor 句子通顺吗 i ___ any books for three months.a haven't buy b hadn't buy haven't. hadn’t seen Granny for half a year and missed her very much.为什么用 hadn’t 有for 不是haven‘t吗? Greens must have been to Shanghai ,_____they?A.hadn't B.didn't C.can't D.weren't还有haven‘t they 现在完成时否定I haven't seen it从来没有看见它I hadn't noticed 怎么一个个have 一个用had I had a such meal since you invited me last time 老师这个填haven't 还是hadn't We had better leave ,hadn't we 这句话有错误吗?还是haven't me 还有werent we I‘m excited to see Mandy tomorrow ,I----- her for years 填hadn't 还是haven't 20.YOU'VE NEVER HAD A GIRLFRIEND BEFORE ,__YOU?A:HAVEN'T B:HAVEC:HAD D:HADN'T i would rather you hadn't done such a thing用haven't done 不可以么 I'm very glad to see you here.I()you had come already.A.don't B.haven't C.didn't knowD.hadn't know where are you going for your holiday?well,we___yeta.haven't decided b.hadn't decided c.don't decide d.didn't decided They must have finished the work,---?A,mustn't they B,haven't they C,hadn't they D,didn't they