1 become

When something or someone becomes a particular thing, they start being that thing.

When you feed a current(电流) through the coil(线圈), it becomes a magnet(磁铁).Anybody can become a qualified teacher.

The past tense of 'become' is became, not 'becomed'.

We became good friend at once.The smell became stronger and stronger.

The past participle is become.

Would you say that life has become a lot easier for you? The notion had become very popular in the United States.

When become is followed by a singular noun group, the noun group usually begins with a determiner(限定词).

Portugal became a colonial power.I became a construction engineer.... the aristocratic young man who becomes his friend.

However, when the noun group refers to a unique job or position within an organization, the determiner can be omitted.

In 1960 he became Ambassador to Hungary.He went on to become head of one of the company's largest divisions.

The following words can be used to mean 'become'. Note that these words can only be followed by an adjective. You do not use a noun group after them.

2 get

Get is very often used to mean 'become'. In conversation, you usually say get rather than 'become'.

It was getting dark.She began to get suspicious.If things get any worse, you'll have to come home.

3 grow

In written English, grow is sometimes used to mean 'become'. You use grow to say that someone or something gradually changes to a particular state or condition.

Some of her ministers are growing impatient.The sun grew so hot that they were forced to stop working.

4 come

Come can be used with loose or unstuck to say that something gradually becomes loose or unstuck.

A buckle had come loose, the pin digging into his skin.Some of the posters came unstuck.

If a dream, wish, or prediction comes true, it actually happens.

My wish had come true.

5 go

If you want to say that someone feels a sudden change in their body, you use go.

I went numb.He went cold all over.Their mouths went dry.

You use go to say that something suddenly becomes slack or limp(柔软的，无力的).

The rope went slack.He went as limp as an armful of wet laundry. (他变得像一团湿衣服一样疲软; an armful of 一抱...东西）

If you want to say that someone becomes blind or deaf, you usually use go.

She was bedridden and going blind.

If you want to say that someone becomes mad, or starts behaving as if they are mad, you use go.

His sister went insane.I'd go crazy if wasn't involved in my work.Uncle Nick went wild with excitement.

There are also several expressions in which go is used to mean 'become'. For example, you say that a plan or scheme goes wrong or goes awry(/ə'raɪ/ 错误的), that a telephone goes dead, or that someone's mind goes blank.

Something must have gone wrong with the satellite link.I answered the phone and the line went dead.

In some expression, go is used to say that a person or organization changes their legal status. For example, you say that someone goes bankrupt, that a company goes public, or that a school goes comprehensive.

If the firm cannot sell its products, it will go bankrupt.

6 'go' and 'turn'

In British English, you sometimes use go or turn to mean 'become'. If you want to say that something becomes a different colour, you use go or turn.

Her hair was going grey.The grass had turned brown.

Note that in American English, go is rarely used like this.

If you want to say that a person's face suddenly changes colour, you use go or turn. For example, you say that someone goes or turn pale(苍白的).

Ralph went crimson.He turned bright red.I went white. I just felt numb. I just couldn't believe it.

Note that you do not say that someone 'gets pale' or 'becomes pale'.