I was puzzled how to do it.

我不知如何做此事。

How to handle should baby cold tussis?

宝宝感冒咳嗽该咋办？

Do you know how to Romanize your name ?

你知道怎字拼你的名字吗?

The law prescribes how to punish this crime.

法律如何处罚这种犯罪做出规定。

Primitive man quickly learned how to manipulate tools.

原始人很快就学会了使用工具。

They disputed how to get the best results.

他们讨论如何获得最佳结果。

How to resolve this crisis in macro- economics?

如何解决宏观济学领域的危机？

That depends (on) how to tackle the problem.

全看怎处理这个问题了。

The salesman demonstrated (how to use) the washing-machine.

售货员表演了如何使用这种洗衣机。

He demonstrated how to use the new machine.

他演示怎使用这台新机器。

The carpenter taught us how to season wood.

这位匠教我们怎材进行干燥处理。

I forgot how to wind the film on.

我忘了如何倒胶卷了。

We are reflecting how to fulfil the task.

我们正考虑如何完成这项任务。

They were plotting how to obtain the necessary information.

他们正在策划如何获取必要的情报。

We finally puzzled out how to open the box.

我们最后终于想出怎打开盒子。

Every farmer knows how to yoke the oxen together.

每个家民都知道怎把牛拴在一起。

Their chief preoccupation was how to feed their families.

他们关注的首要事情是如何养家糊口。

We must figure out how to solve the problem.

我们必须想出解决这个问题的办法。

She was wondering how to act to her superior.

她想知道怎待她的上司。

How to after is 2. hair washed, do clammily?

头发洗后发粘怎么办？