1.
His actions are so irrational that I think he must be off his chump.
他的行为毫无理智，我认为他一定是疯了。
2.
B: He must be crazy. He has been leading an ivory-tower existence. He knows nothing about politics.
他一定是疯了。他可是一直过着象牙塔似的生活。对政治一窍不通。
3.
Are you going with him? You must be out of your gourd.
你和他一块去?你一定是疯了。
4.
He must be a lunatic to drive his car so fast.
他把车开这么快一定是疯了。
5.
He must be off his nut to throw his money about like that.
他那样挥金如土，一定是疯了。
6.
He must be insane to drive his car so fast.
他把车开得这么快，一定是疯了。
7.
Everybody says I must be mad and they are probably right.
大家都说我一定是疯了，他们也许说对了。
8.
B: Really? He must have been mad. She is the apple of his eye.
是吗？他一定急疯了。她可是她的掌上明珠啊。
9.
If he were insane, he was a very cool and collected insanity.
如果他发了疯，他也是个非常冷静和镇定的疯子。
10.
Anyone who thinks the moon is made of green cheese must be mad as a hatter.
要是有人认为月亮是绿色奶酪做成的，那他就一定是疯了。
11.
He must be out of his mind to think he can sail round the world alone.
他一定是疯了才会认为自己能一个人作环球航行。
12.
The only explanation for his behavior is that he' s mad.
对他的行为的唯一解释是他疯了。
13.
You must be mad to do such a thing.
你一定是疯了，干出这样的事来。
14.
She does such foolish things that she must be completely off her chump.
她竟干出这样的蠢事来，一定是发了疯。
15.
You must be insane, you ugly old hag!
你一定是疯了，你这又老又丑的老巫婆。
16.
You must have taken leave of your senses to talk to your mother in that way.
你那样对你母亲说话，一定是发疯了吧。
17.
"Either you are mad, or I am," he declared.
他断言道：“不是你疯了，就是我疯了。”
18.
He must either be mad or drunken .
他不是疯了就是醉了。