助动词专题(一):be的助动词用法
be作助动词用的形式如下: ①am, is, are, was, were ②助动词+be:shall be, will be, can be, etc. ③have/has/had + been(完成时) ④am, is, …being(进行时) (1)表达进行时态 句型 be + V-ing…(进行时态) 例:What are you reading? (你正在阅读什么?) I am reading a magazine. (我正在阅读杂志。) 例:He will be taking a walk in the park at this time tomorrow morning. (明天早晨此时他将会正在公园散步。) 例:She has been teaching English in our school for years. (她已在我们学校教英语许多年了。) 解说:第一例句是表达现在进行时,第二例句是将来进行时,第三例句是现在完成进行时。 (2)表达被动语态 句型 be +p.p. …(被动语态) 例:English is spoken in both Canada and the United States. (加拿大和美国都讲英语。) 例:Those keys were found in your drawer. (那些钥匙是在你的抽屉里找到的。) 例:It can be done much faster in this way. (这件工作用这个方法可以更加快速地做好。) |