1. be careful of        关注

        e.g. She was very careful of her social connections.

        她很在意自己的社会联系。

    be careful about

        e.g. I hope in the future you will be careful about the things you say.

        我希望以后你会对你说的话谨慎一些。

    be careful with

        e.g. Be more careful with your work.

        你对你的工作要更仔细。

    be careful in

        e.g. Be careful in money matters.

         对钱的问题要仔细。

    be careful as to + clause

        e.g. You have to be careful as to how you spend your earnings.

        关于如何花掉你的收入你要谨慎。

    be careful to do sth.

        e.g. Be careful to guard against mistakes in your composition.

        小心在作文中不要犯错误。

    be careful + that clause

        e.g. I must be careful that the pupils behave themselves.

        我必须小心让学生不要淘气。

2. put on  穿（戴）上

        e.g. He put on his hat and said goodbye to us.

        他带上帽子向我们说再见。

    put aside  积攒

        e.g. John has put aside a good sum of money.

        约翰已经攒了一大笔钱。

    put down  镇压

        e.g. The troops were called out to put down the disturbance.

        军队被派去镇压动乱。

    put forward 建议

        e.g. Are you serious in putting forward such a view?

        你提出这一观点是认真的吗？

    put up with 容忍

        e.g. My mother simply wouldn’t put up with her.

        我母亲真的受不了她。

3. take off         脱（摘）去，起飞

        e.g. He took off his wet shoes.

        他把湿鞋子脱下了。

        e.g. A helicopter is able to take off and land straight up or down.

        直升机可以直接起飞或降落。

    take up  从事

        e.g. When he left school, he took up journalism.

        毕业后，他开始从事新闻职业。

    take in  了解，欺骗

        e.g. We could hardly take in what was being said.

        我们几乎不能了解所说的内容。

        e.g. Don’t let yourself be taken in by these politicians.

        不要受这些政客的欺骗。

    take on  呈现

        e.g. His writing has taken on a very peculiar style.

        他的作品呈现出一种奇特的风格。

    take over  接管

        e.g. When shall I take over my new duties?

        我什么时候才能接手我的新工作？

4. at once 立刻

        e.g. Come here at once!

        立刻过来！

    all at once =suddenly  突然

        e.g. All at once I saw a rabbit dart across the road.

        我突然看见一只兔子冲过马路。