He hasnt decided whether to have dinner with me.他还没决定是否和我共进晚餐。
(3)所引导的宾语从句放在主句之前时,只能用whether.
Whether it will rain or snow, we dont mind. 我们不在乎将要刮风还是下雨。
Whether I won or lost, she didnt want to know.我是赢是输她不想知道。
(4)引导主语从句或表语从句时,一般用whether.
The most important was whether they had gone.最重要的是他们是不是已经走了。
Whether he will go with me is a secret.他是否会和我一起去还是个秘密。
if能引导条件状语从句,表示如果,假如,而whether没有此用法。
Well have a football match if it doesnt rain tomorrow.如果明天不下雨,我们要进行足球赛。
Ill tell him if I sees him.我看见他就告诉他。
If youre in danger, please call 110.如果你遇到危险,请拨打110。
5. cost/ spend/ pay/ take
(1) cost一般用某物来做主语,表示(某物)值、花费,既能指花费时间也能指金钱。
The new bike costs me 300 yuan.这辆新自行车花了我三百元。
It will cost you a whole to read through this book.通读这本书将会花费你整整一周时间。
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