八年级英语上册 Unit 10 If you go to the party，youll have a great time（第3课时）（Grammar Focus-3c）同步语法精讲精练习题课件 （新版）人教新目标版(1)(1).pptx

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 he 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 don't know if he will come tomorrow.If he comes，I will 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. Aif Balthough Cuntil Dwhether 2In Chongqing，you can often see many people dance outside together if it _ _ in the evening. Arains Bdoesn't rain Cwill rain Dwon't rain,A,B,3Do you know if we will go for a picnic this Saturday? I think we will if we _ _ any classes. Awon't have Bdidn't have Cdon't have Daren't having 4We're not sure if it _ _ tomorrow.If it _，we won't go hiking.(易错题) Awill rain；rains Bwill rain；will rain Crains；rains Drains；will rain,C,A,二、根据句意，用括号中所给单词的适当形式填空。 5I _ (ask) the teacher for help if I don't understand. 6You can't get good grades if you _ (not work) hard. 7You must stop if the traffic light _ (be) red. 8Don't go out if you _ (not finish) your homework. 9If I _ (be) free，I'll visit my grandparents this weekend.,will ask,don't work,is,don't finish,am,本课时其他知识点精讲精练 upset形容词，意为“难过；失望；沮丧”。 eg：He was upset and didn't 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 one's advice接受某人的建议,1Mary didn't catch the last bus，so she took a _ (出租车) home. 2Jack 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 advices Bmany advices Csome advice Dan advice 4_ I call you a taxi? No，thanks.The weather is fine and I'd like to walk home. AShould BMust CWould DMight,taxi,upset,C,A,