初中英语语法讲解,内容详实,讲解细致,步步分析到位,是您学习初中英语语法的得力助手。主要讲解初中英语助动词用法这一知识点,让各位初中同学理清知识脉络,梳理清楚做题思路,希望能给同学们的英语学习带来一点帮助。
1、助动词be(am, is, are, was, were, being, been)的用法
(1) be后跟现在分词构成进行时态。
Who is playing the violin?谁在拉小提琴?
She was reading a book then.那时她正在读书。
(2)be后跟过去分词构成被动语态。
He was asked to do the work.有人要他干这件工作。
You are invited to attend the meetintg.有人邀请你参加会议。
2、助动词have(has, had, having)的用法
(1)助动词have可以构成完成时或完成进行时
He has been a doctor for 10 years.他当医生十年了。
This is the place I have been longing to visit.这就是我一直渴望参观的地方。
(2)和不定式构成谓语,表示客观上不得不做的事情。
We've missed the train. We'll have to wait for another one.我们己经误了火车,我们只能等下一列。
-Do we have to start work?我们得立刻工作吗?
-No. We don't have to.不,不必了。
英语语法总是用错,这个英语资源是你必备的。
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