练习序号 15 am/is/are 69 I am doing (现在进行时) 1014 I do/work/like (一般现在时) 1519 I am doing and I do (现在进行时与一般现在时比较) 2021 have got 2229 was/were and I worked/got/went (一般过去时) 3032 I was doing and I did (过去进行时与一般过去时比较) 3335 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) 3639 I have done (现在完成时) 4043 How long have you … ? (现在完成时的疑问句) 4449 I have done and I did (现在完成时与一般过去时比较) 5052 I do / I have done / I did (一般现在时、现在完成时与一般过去时) 5357 is done / was done and is being done / has been done (被动语态) 5860 be/have/do and regular/irregular verbs (动词形式) 6163 What are you doing tomorrow? (现在时表示将来) 6466 Im going to do 6770 will/shall 7174 I am doing / I am going to do / Ill do (表示将来的形式) 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 ……