2017-2018学年 牛津版 选修6 Unit 3 Understanding each other- Grammar课件 (共39张PPT)
2017-2018学年 牛津版 选修6 Unit 3 Understanding each other- Grammar课件 (共39张PPT)第3页

 did were

should would might could + do

had +done

should would might could have done

did

were to do

should do

should would might could + do

would: might: could : should:

result possbility ability/permission/possibility should:only used after first person