賓從句型
1、主句+whether（if）+從句
I don't konw whether/if he'll arrive in time.
2,、主句（現(xiàn)在/將來）+從句（任一時(shí)態(tài)）
主句（過去）+從句（過去相應(yīng)時(shí)態(tài)）
I konw you didn't konw what I think at all.
He asked me if I was reading the novel The Old Man and the Sea when he came in.
3,、主句+從句(一般現(xiàn)在）從句表客觀事實(shí)或真理
My mother told me that a friend in need is a friend indeed.
