if条件状语从句

一．概念:if引导的条件状语从句属            。从句表示主句动作发生的               ，从句可以放在            之前，也可以放在主句之后。

二．分类：                  ，                    ，                     。

三．用法

1.主句用一般将来时，从句则用一般现在时。可以概括为“主将从现”。

(1).将下面的两个简单句合并为一个复合句一条件状语从句。

The weather will be sunny tomorrow. We will have a picnic.

                                                                                                                                                   .

She will get good grades next time. Her mother will be happy.

                                                                                                                                                   .

We will be free tomorrow. We will go on a school trip.

                                                                                                                                                   .

They will be free this Friday. They will play basketball with their friends.

                                                                                                                                                   .

It won't rain the day after tomorrow. We ll go hiking.

                                                                                                                                                   .

He won't watch TV tonight. He will finish his homework.

                                                                                                                                                   .

(2)用所给词的适当形式完成下列句子.

If the weather                  (be) fine tomorrow, we will take a walk in the park.

If she                  (arrive) next Sunday, will you meet her at the airport?

③ My mother                    (not be) happy if i play games for too long.

If it                ( rain) tomorrow, what will you do at home?

If it rains tomorrow, we              (go) fishing.

I'm waiting for my friend now, if she                 (not come), I will go shopping alone.

If Nick                  (get) home too late, he                 (miss) his favorite cartoon.

If Tom's mother               (go) out this weekend, Tom will look after his younger  sister.

If everyone                      (protect) the environment, the world will become better and better.

If my family                    (move) to America, I will speak English well and understand American culture well.

(3).翻译下列句子

如果今晚我熬夜，我明天上学会退到。                                                                                          。

②如果我没完成家庭作业,老师会很生气。                                                                                         。

③如果你经常吃垃圾食品，你就不会健康。                                                                                      。

④如果我玩游戏，我将没有足够的时间学习。

                                                                                                                    。

如果你太内向，你将很难交到朋友。                                                                                             。

如果你去她的生日聚会,你会带什么？                                                                                           。

如果电话响了，你会去接吗?                                                                                                            。

如果每个人都努力学习，我们的将会字实现。

                                                                                                               。

如果不认真写作业，你在作业中会犯更多的错误。

                                                                                                              。

⑩如果每个人都开车上班，交通将会更拥挤。

                                                                                                              。

四.小组讨论如果发生下列情況，会出现什么情况?请用完整句子回答。

If you stay up late tonight, what will you do?

If the weather is rather bad tomorrow, what will you do?

If it snows tomorrow morning, how will you go to school?

If your mother doesn't understand you, what will you do?