单元语法专项让 引导的条件状语从句 句式结构:If+陈述句，主语+谓语. ( 或主语+谓语+if+陈述句.)如果主句为一般将来时，i加|导的条件状语从句通常用一般现在时。这|导的条件| 用法4 当主句中含有情态动词can，may，must状语从句 等时，从句常用一般现在时。当主句尖祈使名时，从名也党用一般现在时。Re 的if与条件状语从句中的if的区别: 宾语从句中的if表示“是否”，相当于whether，引导宾语从句时，从句时态需要根据语境确定。条件状语从句中的if表示“如果”，从句中的时态通常用一般现在时。 给单词的适当形式填空。 I工.根据句意，1.If it ee Snow) ,he (play)Soccer with me tomorrow.2. Please wake me ipP这be (come) back.3. She must see a dentist 认 she (have) atoothache.4.工hope to have atalk with youif you (be) freeafter the meeting.5.I dont know if she (come) to mybirthday party tomorrow. IF shs (come ) ，Il be very happy. 开.用证将两个句子合并为一句。1. TDm going to take the bus to school. 工 will get toSchool on time. 2. He is going to visit the museum。He will havefun. 3. She is free. She will go to the park. 4. It is going to snow. 工 will read some books athome. S. They are going to the Summer Palace. They willtake lots of photos. 亚. 单项选择。( )1. Talk to your teacher and you will get helpyou have a problem.A.after 卫. 认 C.nurntii ， D.so ( )2. You will be late for school you don”t get up early.A.but B.证 C.and D. or