these和those的用法和区别

　1.this, that, these和those是指示代词，these是this的复数形式,指时间,距离较近的或下面要提到的人或事;those是that的复数形式,指时间、距离较远或前面已经提到过的人或事物。

　　2.在回答主语是these或those的疑问句时，通常用they代替these或those以避免重复。

These/those are the plural forms of this/that, and behave in the same way.

These/those是this/that的复数形式，且使用方法相似。

As a determiner this is used to identify a specific person or thing close at hand or being experienced.

作为限定词，this用来指定在手边的或正在经历的具体人或物，意为“这个”

These表示this的复数形式，意为“这些”：

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着天能暖和一点吧？

As a determiner that refers to the more distant of two things near to the speaker, or to a specific thing previously mentioned.

作为限定词，that用来指两个物体中相对于说话者更远的那一个，或某个之前提及的具体事物。意为“那个”

Those表示that的复数形式，意为“那些”：

He did buy me those books a week  ago.

他确实在一个星期前给我买了那些书。

小练习：

Sonny has many qualities worth recognizing, and the purpose of this letter is to point out two of [these/those] qualities.

Sonny有很多值的肯定的品质，这封信的目的就是指出（这些/那些）品质中的两种

答案：these