Usage induction of "special question words + Verb infinitus"

I. "question words + infinitus"Structure

It consists of the question Pronoun "who", "whm", "what", and "which". The question adverbs include "when", "how", and "where.

Choosing what to eat is no longer as easy as it once was. It's not as easy as before to choose what to eat.

How to describe people is today's topic. Today's topic is how to describe people.

Ii. "question words + infinitus"Functions

It can be used as the subject, object, table, and other components in a sentence.

1. As the subject

How to give advice in English is what I am trying to learn. I am trying to learn how to make suggestions in English.

2. As the object

① As the verb object

We have to start somewhere if we want to learn how to write plays. To learn to write a script, we must start with it.

② As the object of the prefix

We had better learn to make the right choices about what and how we eat. We 'd better learn what to choose and how to eat correctly.

When you are trying to advise someone about what to do or what not to do, you can use shoshould/ought to or shoshould not/ought not. when you want to suggest someone to do or not do anything, you can use shocould/ought to or shocould not/ought not.

3. Expression

My question is where to find the answer. Where can I find the answer.

Iii. "question words + infinitus"Usage

When a phrase "question word + infinitus" is used as a "noun" in a sentence, it can be written as a corresponding clause.

I am not sure how to behave at the dinner table. (= I am not sure how I shocould behave at the dinner table.) I have no idea about table manners.

In such a structure, the question pronoun must be connected to a thing verb or a phrase equivalent to a thing verb (except who and which)

[Mistake] I don't know what to talk.

[Positive] I don't know what to talk about.

But we can say: We haven't decided who (which) to go. We haven't decided who to go yet.

After the question Adverbs in the sentence structure, you must take the inactive verb; if the verb is connected, you must have the object of the verb.

I don't know how to talk.

I wonder if you cocould tell me how to do it. I wonder if you can tell me how to do it. (It cannot be said:... how to do .)

From: http://wenku.baidu.com/view/bc741459312b3169a451a4ad.html