致学生
致老师
练习序号
1–5 am/is/are
6–9 I am doing （现在进行时）
10–14 I do/work/like （一般现在时）
15–19 I am doing and I do （现在进行时与一般现在时比较）
20–21 have got 22–29 was/were and I worked/got/went （一般过去时）
30–32 I was doing and I did （过去进行时与一般过去时比较）
33–35 I do / I am doing and I did / I was doing （一般现在时、现在进行时、一般过去时与过去进行时）
36–39 I have done （现在完成时）
40–43 How long have you … （现在完成时的疑问句）
44–49 I have done and I did （现在完成时与一般过去时比较）
50–52 I do / I have done / I did （一般现在时、现在完成时与一般过去时）
53–57 is done / was done and is being done / has been done （被动语态）
58–60 be/have/do and regular/irregular verbs （动词形式）
61–63 What are you doing tomorrow （现在时表示将来）
64–66 I’m going to do
67–70 will/shall
71–74 I am doing / I am going to do / I’ll do （表示将来的形式）
75–76 might
77–80 can and could
81–82 must mustn’t don’t need to
83–85 should
86–87 I have to
88–90 Do this! Don’t do that! Let’s do this!
91–92 I used to
93–94 there and it
……
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