Thanks vii
致学生 viii
致老师 xv
现在时与过去时
1 现在进行时 (I am doing)
2 一般现在时 (I do)
3 现在进行时与一般现在时 1 (I am doing 与 I do)
4 现在进行时与一般现在时 2 (I am doing 与 I do)
5 一般过去时 (I did)
6 过去进行时 (I was doing)
现在完成时与过去时
7 现在完成时 1 (I have done)
8 现在完成时 2 (I have done)
9 现在完成进行时 (I have been doing)
10 现在完成进行时与现在完成时 (I have been doing 与 I have done)
11 how long have you (been) …
12 for 与 since when … 与 how long …
13 现在完成时与一般过去时 1 (I have done 与 I did)
14 现在完成时与一般过去时 2 (I have done 与 I did)
15 过去完成时 (I had done)
16 过去完成进行时 (I had been doing)
17 have 与 have got
18 used to (do)
将来
19 现在时 (I am doing / I do) 表示将来
20 I’m going to (do)
21 will 与 shall 1
22 will 与 shall 2
23 I will 与 I’m going to
24 will be doing 与 will have done
25 when I do 与 when I’ve done if 与 when
情态动词
26 can、could 与 (be) able to
27 could (do) 与 could have (done)
28 must 与 can’t
29 may 与 might 1
30 may 与 might 2
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