21世纪教育网
设计作品2917830
结构
例句 1
一般现在时
am/is/are;do;does
I work. 2
一般过去时
was/were;did
I worked. 3
一般将来时
will +do
I will work. 4
过去将来时
would+do
I would work at a hospital. 5
现在进行时
am/is/are+doing
I am working. 6
过去进行时
was/were+doing
I was working. 一、现在完成时的构成 1、基本结构: 助动词have/has +过去分词done 助动词have/has,无实义,帮助构成时态结构,不可省略。 2、基于结构产生的句式变化 (1)肯定式:主语 +have/has+过去分词done +… (2)否定式:主语 + haven’t/hasn’t +过去分词done+… They have lived here for ten years. 2、基于结构产生的句式变化 (3)一般疑问句:Have/Has+主语 +过去分词done +… ? 助动词have/has帮助实现句型转换。 They have lived here for te
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