didn't finish和have not finish的区别请问以下2句有什么微妙的区别吗：1.He didn't finish his homework.2.He hasn't finished his homework.

didn't finish和have not finish的区别请问以下2句有什么微妙的区别吗：1.He didn't finish his homework.2.He hasn't finished his homework. We didn't have enough time.We couldn't finish the work.(合并句子) We didn'We didn't ___ ___ ___ ___ finish the work. We didn't have enough time.We couldn't finish the work .(合并句子） Without your help, we ____ this task.A. don't finish B. will not finish C. didn't finish D. would not have finished为什么选D? Without your help,we ____ this task.A.don't finish B.will not finish C.didn't finish D.would not have finished without you help .we---this taskA.don't finish B.will not finish C.didn't finish D.would not have finished选哪个 麻烦讲详细点 didn't have to 和don''t have to 区别 请问did,didn't和have,haven't有什么区别吗?它们都是代表过去的,比如I didn't finish my work yesterday和I haven't finish my work yesterday都是代表我昨天没有完成工作,但是有什么区别呢?这两个词的用法有什么 hadn't 和 didn't have的区别RT he have no finished his homework,he doesn't finish his homework,he didn't finish his homework有什么区别? We didnt finish the work in time. You____us since you were there.A)might help B)should help C)could have helped D)must have helped hadn't have和didn't have区别 分别的意思 We didn't have enough people to do the work,so we couldn't finish the work on time.合并句子 he didn't finish his homework yesterday改为被动语态 You didn't finish the project.I didn't finish the project,either用neither...nor合并句子 didn't need to和和need't have done什么区别? I didn't finish the work on time.Alice didn't didn't finish it,either(合并为一句） The boss didn’t let the workers have a rest.变被动We can go home when we finish our homeworkSometimes I see her dance in the garden