语法whetherifpk
在名词性从句(如主语从句,宾语从句,表语从句)使用中我们有两个引导词的意思都解释为是否,它们就是whetherif
很多同学会搞不清楚它们的用法,既然意思一样,那么用法是否完全一样呢?当然不完全一样!!
今天,老师就给大家一个简单的口诀,让大家记住它们的用法区别~~
首先,我们先给这两个引导词加上性别:if是女的,whether是男的。
一般而言,男的胆子都比较大,所以遇到如下困难和危险都是它勇往直前!
前有介be狼,后有不定虎,位句首,加是否。
这个口诀十分短小精悍,我想大家应该都会觉得朗朗上口吧!
那么,听老师来分析一下这四句话到底是什么意思吧~
前有介be狼:介词和be动词之后只能whether,不能用if
e.g. It depends on whether he will come or not.
(此句中on为介词,所以后只能加whetherwhether引导宾语从句)
e.g. The problem is whether it will be sunny tomorrow.
(此句中isbe动词,只能用whether,这里whether引导表语从句)
后有不定虎:后有不定式,前面只能用whether,不能用if
e.g. He has not decided whether to go or not.
(to go是动词不定式,前面只能用whetherwhether引导宾语从句)
位句首:放句首只能用whether,不能用if
e.g. Whether he will go to the party is not sure.
(whether放句首,if不能放句首,这里whether引导主语从句)
加是否:后接or not,前面只能用whether,不能用if
e.g. Mary has not decided whether or not she will go to see her friends off at the airport.
(whether后可接or notif不可,这里whether引导宾语从句)
大家都清楚了吗??这个口诀一定要背出来哦,这样碰到whetherif的题目就不会出错啦!
那我们来做几道题目试试吧~
whetherif填空:
1. She asked Tom ______he would come the next day.whether是什么意思
2. Linda is interested in the movie, but she cannot decide _____ she will go to see it tomorrow.
3. ______he will come to the meeting is not known.
4. He is not sure ________to go to the library or go to the classroom.
5. They have not agreed on ______ they will hold the second meeting or not.