壹、can't的含義及雙語例句
can't是cannot 的常用口語形式。表示推薦，是語氣非常堅決的否定推測。例句有：
1、Can't you control your children?
妳就不能管管妳這些孩子？
2、Be reasonable! We can't work late every night.
要講道理呀！我們不能每天晚上都加班到很晚呀。
3、I can't see any future in this relationship.
我看不出這個關系會有什麽前途。
4、Why can't you ever see my point of view?
妳怎麽老不明白我的觀點呢？
5、Many children can't function effectively in large classes.
許多孩子在大班上課時學習效果不好。
6、I can't see you now ─ some other time, maybe.
我現在不能見妳——也許別的時候吧。
7、They think I can't do it, but I'll show them!
他們以為我做不了，我卻要做給他們看看！
二、mustn't的含義及雙語例句
mustn't是must not 的.常用口語形式，意思為禁止、不允許。例句有：
1、You mustn't leave the gate open.
妳壹定不要讓大門敞開著。
2、I mustn't be late or Dad will go up the wall.
我不能晚了，否則爸爸會發脾氣的。
3、We mustn't let ourselves be overtaken by our competitors.
我們決不能讓競爭對手超過我們。
4、We mustn't allow it to bias our teaching.
我們決不允許它影響我們的教學。
5、We mustn't belittle her outstanding achievement
我們壹定不能小瞧了她所取得的傑出成就。