2017 小升初英语语法名词性 从句知识:应注意的两个问题
一、词序问题
名词性从句总是用陈述句词序,则不能使用疑问句词序,尤其是当名词性从 句由“疑问词”引导时,不能受疑问句的影响而误用疑问句词序:
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。 二、时态问题
由于由when引导的时间状语从句和以if引导的条件状语从句要用现在时表 示将来意义,而不能直接使用将来时态,所以许多同学容易受此影响在 if 引导名词性从句时也用现在时表示将来意义。请看几题:
(1) I don 't know if he ______ or not tomorrow. A. come B. comes
C. will come D. is coming
此题答案选C,句中if引导的不是条件状语从句(if工如果),而是宾语从句 (if= 是否),句意为“我不知道明天他是否会来。 ”
(2) I don't know if she _________ , but if she _______ I will let you know.
A. comes, comes B. will come , will come C. comes, will come D. 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。
whe n和
(3) “When he ______ is not known yet. ” “But when he ___ , he will be warmly welcomed.
A. comes , comes B. will come , will come C. comes, will come D. 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。 另外,当主句为过去时态时, 宾语从句通常要用过去的某种时态与之呼应 ( 表 客观真理时除外 ) :
The teacher told us that he knew everything. 老师告诉我们他知道一切。 The teacher told us that light travels faster than sound. 我们光比声音传播得快。
老师告诉