His phone must be switched off.

他的电话一定是关机了。

This structure must be stable.

这种结构一定很稳固。

These books must be very old.

这些书一定年头很久了。

The sign must be taken down.

这个指示牌一定要摘下来。

I really must be quite mad!

我真的一定是气坏了！

They must be stinking rich.

他们一定富得流油。

There must be some mistake.

一定是出了什么差错。

"You must be freezing," she said.

“你一定冻坏了吧，”她说。

She must be sick, Tatiana thought.

她一定是病了，塔蒂亚娜心想。

She must be very proud of herself.

她一定非常自豪。

"You must be Emma," said the visitor.

“你一定是埃玛,”来访者说道。

Ivy must be a glutton for punishment.

艾威肯定是个不怕受罚的人。

You must be starving, you poor things.

你们一定是饿坏了，你们这些可怜的家伙。

That must be her now.

这会儿一定是她了。

We must be well prepared, there must be no slips.

我们必须好好准备，一定不要有差错。

Accurate records must be kept.

必须保存准确的记录。

All this mail must be answered.

所有这些信件都必须回复。

You must be home by 11 o'clock.

你必须在11点之前回家。

'I must be crazy,' she thought.

“我准是疯了。”她想。

She must be 25 or thereabouts.

她肯定在25岁上下。

All income must be declared.

所有收益必须申报。

I'm early—my watch must be fast.

我早了—我的表肯定快了。

You must be mad to risk it.

你去冒这种风险，简直是疯了。

Remedial action must be taken now.

现在必须进行补救。

That ring must be worth a fortune.

那枚戒指肯定要值好多钱。

It must be quite some car.

那辆汽车肯定很了不得。

All drinking water must be filtered.

所有饮用水必须经过过滤。

The address must be printed in full.

地址必须以正体详尽填写。

She must be at least 40.

她至少应该有40岁了。

Justice must be tempered with mercy.

法外尚需施恩。