第二句话的意思是,如果你十分钟之前进聊天室的话就能知道我们在说什么了,这是一个对过去的虚拟条件句,由后面的would have known 可知前面应该用过去完成时,完整的应该是if you had joined ,但省略了if 的话就要把had 提前,所以选a .就这样.多看看关于虚拟语气和情态动词的语法会好一点.
Hi ,i see you are giving a lecture again!what's it about wel
1个回答
相关问题
-
It’s nice to see you again. What
-
．—Really ? Who will give ____lecture ? What is it about ?
-
( )I missed his lecture again!
-
You don’t know ______ I want to see you again. It’s a year s
-
Really?Who will give_lecture?what is it about?应该填a 还是the?
-
---I suppos he’s late again. ----You ___ it. A．are guessing
-
I can't say ____I want to see you again.It's a year since I
-
——What do you give Jim for his birthday?——A What about a boo
-
Hello,it's nice ___ see you again
-
-Hi ,Amy.May I ___a favor ___ you?-Sure,what's it?