these

1. DET You use these at the beginning of noun groups to refer to someone or something that you have already mentioned or identified. 这些 (用于名词前，指前文曾提到的人或物)

A committee has been formed. These people can make decisions in ten minutes which would take us months. 委员会已经成立。这些人能在10分钟内做出决定，换作我们则要花几个月。

2. PRON These is also a pronoun. 这些

"I have faith in these guys," the coach said. "These are good players."

“我相信这些人，”教练说道。“这些都是好球员。”

3. DET You use these to introduce people or things that you are going to talk about. 这些 (用于引出将要谈及的人或物)

Your camcorder should have these basic features: autofocus, playback facility, zoom lens. 你的便携式摄像机应该具有这些基本特征：自动调焦、回放及变焦镜头。

4. PRON These is also a pronoun. 这些

Take care of yourself while you are pregnant. These are some of the things you can do for yourself. 怀孕期间要照顾好自己。这些是你自己可以做的事情。

5. DET In spoken English, people use these to introduce people or things into a story. 这些 (口语中用于引出故事中的人或物)

I was by myself and these guys suddenly came towards me. 我独自一人时，这些人忽然向我走来。

6. PRON You use these when you are identifying a group or asking about their identity. 这些 (用于识别或询问身份)

These are my children. 这些是我的孩子。

7. DET You use these to refer to people or things that are near you, especially when you touch them or point to them. 这些 (尤指所碰触或指向的附近的人或物)

These scissors are awfully heavy. 这几把剪刀非常重。

8. PRON These is also a pronoun. 这些

These are the people who are helping us. 这些是正在帮助我们的人。

9. DET You use these when you refer to something which you expect the person you are talking to to know about, or when you are checking that you are both thinking of the same person or thing. 这些 (指双方均了解的事物)

You know these last few months when we've been expecting it to warm up a little bit?

你知道最近这几个月我们一直盼望天气能暖和一些吗？

10. DET You use these in the expression these days to mean "at the present time." 目前

These days, people appreciate a chance to relax. 目前人们很珍惜能放松的机会。