2.以let开头的祈使句
Let 的反意疑问句：
a. Let's 包括说话者。例如：
Let's have another try, shall we / shan't we? = Shall we have another try? 我们再试一次，如何？
b. Let us 不包括说话者。例如：
Let us have another try，will you / won't you? = Will you please let us have another try? 你让我们再试一次，好吗？
否定结构：例如：
Let's not talk of that matter. 不要谈这件事。
Let us not talk of that matter. 你不要让我们谈这件事。
第24章 感叹句
1.祈使句有两种类型，一种是以动词原形开头，在动词原形之前加do (但只限于省略第二人称主语的句子)。例如：
Take this seat. 坐这儿。
Do be careful. 务必小心。
Don't move. 不准动。
Don't be late. 不要迟到。
祈使句用以表达命令，要求，请求，劝告等。
1-10CBDDBABCAB 11-20CBABCBDADC
21-30DABCBBDAAB 31-40DACCBBADBD 41-50ACBDADCAAD
50. ＿＿＿you go,you should bear the motherland in mind.
A. Where B. Whenever
C. However D. Wherever
49. To play fair is as important as ＿＿＿＿,I think.
A. to play well B. play well
C. we play well D. playing well
48. Lily has some idea ＿＿＿ she’s going to be when she grows up.
A. what B. that C. as D. which
47. She tried every way ＿＿＿ she could find to solve the problem.
A. how B. in which C. that D. which
46. ＿＿,so he didn’t come to school last week.
A. Though he was ill B. Being ill
C. Having been ill D. He was ill
45. ＿＿＿does he do his work well,＿＿＿ he helps others with their work.
A. Not only；but also B. Neither；nor
C. Either；or D. Both；and