名词性从句应注意的问题思维导图

误：I didn’t know where did he live.

正：I didn’t know where he lived.我不知道他住哪儿。

误：Who will he marry remains unknown.

正：Who he will marry remains unknown.他同谁结婚还不知道。

(1)I don’t know if he ________ or not tomorrow.

A.come B.comes

C.will comeD.is coming

此题答案选C，句中if引导的不是条件状语从句(if≠如果)，而是宾语从句(if＝是否)，句意为“我不知道明天他是否会来。”(from www.yygrammar.com)

(2)I don’t know if she ________, but if she ________ I will let you know.

A.comes, comesB.will come, will come

C.comes, will comeD.will come, comes

答案选D，第一个if引导的是宾语从句，第二个if引导的是条件状语从句。

(3)“When he _____ is not known yet.” “But when he ____, he will be warmly welcomed.”

A.comes, comesB.will come, will come

C.comes, will comeD.will come, comes

答案选D，第一个when引导的是主语从句，第二个when引导的是时间状语从句。

The teacher told us that he knew everything.老师告诉我们他知道一切。

Theteachertoldusthatlighttravelsfasterthansound.老师告诉我们光比声音传播得快。