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1、Unit 10If you go to the party，youll have a great time!第三课时(Grammar Focus3c)单元同步语法精讲精练含义：if引导的从句在复合句中表示条件，作主句的条件状语，称为条件状语从句，表示假如从句的动作发生，主句的动作就(不)会发生。条件状语从句的引导词：条件状语从句通常由连词if(如果；假如)，unless(if.not除非；如果不)引导。eg：You will get good grades if you study hard.如果你努力学习，就会取得好成绩。I will not go to the party unless h
2、e goes there too.我不会去参加聚会的，除非他也去。条件状语从句的位置：条件状语从句位置灵活，可放在主句之前，但要用逗号隔开；也可放在主句之后。条件状语从句的时态：当主句为以下三种情况时，条件状语从句用一般现在时表示将来：当主句为一般将来时时；当主句的谓语中含有can，may，must等情态动词时；当主句为祈使句时。【拓展】为避免重复，条件状语从句常用助动词do(does，did)来替代上文所提到的动作。if还可表示“是否”，相当于whether，主要用于宾语从句。eg：I dont know if he will come tomorrow.If he comes，I will
3、 tell you.我不知道他明天是否会来。如果他来，我就会告诉你。(前一个if表示“是否”，后一个if表示“如果”。)一、单项选择。1Your dream will come true _ _ you put your heart into it.AifBalthough Cuntil Dwhether2In Chongqing，you can often see many people dance outside together if it _ _ in the evening.Arains Bdoesnt rainCwill rain Dwont rainAB3Do you know
4、if we will go for a picnic this Saturday?I think we will if we _ _ any classes.Awont have Bdidnt haveCdont have Darent having4Were not sure if it _ _ tomorrow.If it _，we wont go hiking.(易错题)Awill rain；rains Bwill rain；will rainCrains；rains Drains；will rainCA二、根据句意，用括号中所给单词的适当形式填空。5I _ (ask) the teac
5、her for help if I dont understand.6You cant get good grades if you _ (not work) hard.7You must stop if the traffic light _ (be) red.8Dont go out if you _ (not finish) your homework.9If I _ (be) free，Ill visit my grandparents this weekend.will ask dont work is dont finish am本课时其他知识点精讲精练upset形容词，意为“难过
6、；失望；沮丧”。eg：He was upset and didnt know what to do.他很难过，不知道该怎么办。advice不可数名词，意为“建议”。表示“一条建议”用a/one piece of advice，表示“一些建议”用some advice。【拓展】give sb. some advice(give some advice to sb.)给某人提一些建议；ask for advice征求意见；follow/take ones advice接受某人的建议1Mary didnt catch the last bus，so she took a _ (出租车) home.2
7、Jack is _ (沮丧) about losing the money for buying a schoolbag.3Miss Li，could you give me _ on English learning？(易错题)OK.First you should speak English every day.Aany advicesBmany advicesCsome advice Dan advice4_ I call you a taxi?No，thanks.The weather is fine and Id like to walk home.AShouldBMust CWouldDMighttaxiupsetCA
