致學生
致老師

練習序號
15 am/is/are
69 I am doing （現(xiàn)在進行時）
1014 I do/work/like （一般現(xiàn)在時）
1519 I am doing and I do （現(xiàn)在進行時與一般現(xiàn)在時比較）
2021 have got 2229 was/were and I worked/got/went （一般過去時）
3032 I was doing and I did （過去進行時與一般過去時比較）
3335 I do / I am doing and I did / I was doing （一般現(xiàn)在時、現(xiàn)在進行時、一般過去時與過去進行時）
3639 I have done （現(xiàn)在完成時）
4043 How long have you … ? （現(xiàn)在完成時的疑問句）
4449 I have done and I did （現(xiàn)在完成時與一般過去時比較）
5052 I do / I have done / I did （一般現(xiàn)在時、現(xiàn)在完成時與一般過去時）
5357 is done / was done and is being done / has been done （被動語態(tài)）
5860 be/have/do and regular/irregular verbs （動詞形式）
6163 What are you doing tomorrow? （現(xiàn)在時表示將來）
6466 Im going to do
6770 will/shall
7174 I am doing / I am going to do / Ill do （表示將來的形式）
7576 might
7780 can and could
8182 must mustnt dont need to
8385 should
8687 I have to
8890 Do this! Dont do that! Lets do this!
9192 I used to
9394 there and it
……