if-when-主将从现.ppt
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如果你去参加聚会,你将会过的很愉快If you go to the party, you will have a great time.如果明天不下雨,我们将去公园Unless it rains tomorrow, we will go to the park.我一到上海我就给你打电话。
I will call you as soon as I arrive in shanghai.当我长大的时候,我打算做一名篮球运动员。
When I grow up ,I am going to be a basketball player.主将从现通常用在时间状语从句、条件状语从句和让步状语从句中。
主要标志有:if\unless \until\when \as soon as用法一、主将从现1.Can I take Lisa to the aquarium tomorrow? If she________ there, she _______ a good time.A. goes; hasB. will go; hasC. will go; will haveD. goes; will have2.If it ________ this Saturday, we ________ for a picnic.A. won’t rain;shall goB. doesn’t rain; will goC. isn’t rain; goD. doesn’t rain; go如果明天是晴天,让我们去钓鱼吧。
If it is sunny tomorrow,let's go fishing.用法er、祈使句表将来如果明天是晴天,让我们去钓鱼吧。
If it is sunny tomorrow,let's go fishing.1. Don’t talk loudly at the meeting. If you ________, youAwill have to leave.A. doB. areC. did2.Put your hands behind your back. Don’t speak. We’llB_____ in ten minutes.A. backB. be backC. are backD. are back to you3.—Look at the noisy kids!—Haven’t you heard the saying “When the cat is away,Dthe mice ______?”A. playB. playedC. are playingD. will play4.If there is any change to the plan, I ______ you as soon asDpossible.A. toldB. have toldC. tellD. will tellA5..If there no buying and selling of animals, there no killing in nature.A. is; will beB. will be; will beC. is; isD. will be; isIf 表如果主将从现if或whether表“是否”随题意常用将来时我不知道她明天是否去参加聚会。
主将从现,主过将从过,主现从现-if句上个学期,我们曾经学过由if 引导的句⼦,你还记得吗?对了,“ I’ll not go to the zoo if it rains tomorrow. ( 假如明天下⾬,我就不去动物园。
) You can come to the party if you don’t wear jeans.(如果你不穿⽜仔裤,你就能来舞会。
)” 这个学期⼜在本单元见到了似曾相识的同样由if引导的句⼦,⽐如:“If I won the lottery, I would give it to medical research. (假如我赢了彩票的话,我就捐给医学研究。
) If I were you, I would wear jeans and T-shirt.(如果我是你,我就穿⽜仔裤和T恤。
)”这两个单元学到的句⼦都是由if引导的。
那么,它们有什么区别呢?对了,分两种情况:1.something may possible happen某事发⽣的可能性较⼤。
这种情况,有个⼗三字⼝诀:“主将从现,主过将从过,主现从现”。
即主句是⼀般将来时,从句⽤⼀般现在时;主句⽤过去将来时,从句⽤⼀般过去时;当主句中有can/can’t的话,则从句⽤⼀般现在时。
例如:If he has time, he will come tomorrow.If she finishes early, she can come back early.If you don’t do homework, the teacher will scold you.2.it is just imaginary, and nothing will happen 某事只是想象的,并不会发⽣,或者发⽣的可能性很⼩。
则要⽤我们常说的虚拟语⽓。
例如:If he were kind, he would help me with it. (He isn’t.)If I had more money, I would buy all of them. (I don’t.)If he were generous, he would give us a good treat. (He isn’t.)If you were tired, you would find a good job. (You aren’t.)If I were you, I would buy the dearest one. ( I am not.)任务设计任务I. 请⽤正确的形式填空。