可以引导名词性从句。

　　Whatever (＝No matter what) you say，I won't believe you.(whatever 引导让步状语从句)

　　I'll eat whatever(≠no matter what) you give me.(whatever引导宾语从句)

　　(2)however后要紧跟形容词或副词。

　　4．whether ...or ...引导的让步状语从句

　　whether...or...引导让步状语从句时，表示"不论是否；不管是......还是......"之意。

　　Whether the weather is good or bad，they will set off as planned.

　　不管天气是好还是坏，他们都要按计划启程。

　　Ⅰ.单句语法填空

　　1．He won't lose weight he keeps a diet.

　　2．Young he is，he has been to many countries.

　　3．He is always on time for school it rains snows.

　　4． you had come a few minutes earlier，you would have met him.

　　【导学号：03532017】

　　5． he works hard，he makes little progress.

　　【答案】　1.unless 　2.though/as 　3.whether；or 4．If　 5.Though/ Although

　　Ⅱ.单句改错

　　1．She says that she'll have to close the shop if business improves.

　　2．I will go，if you come with me or stay at home.

　　3．-Would you like to go fishing with me tomorrow?

　　-Provide that you give me a lift in your car.