英语插入语是指“插在句子中的词语或句子”，可以是词、词组、从句、句子，从句子中拿掉也不影响句子的语法正确。实际使用经常用括号、破折号、逗号等隔开。

插入语可能发挥以下6点功能：

1. 对一句话进行附加解释、说明或总结；

2. 表示说话人的态度和看法；

3. 起强调作用；

4. 为了引起对方的注意；

5. 转移话题或说明原因的作用

6. 也可以承上启下使语句间的衔接更紧密。

下面总结一下插入语的形式：

1. 形容词或形容词短语作插入语

worst still, sure enough, strange, most important of all等。

Strange, there is nobody in the classroom.

很奇怪，教室里没人。

2. 副词或副词短语作插入语

personally, honestly, fortunately, luckily, for us, though, besides, exactly, surely, frankly, still otherwise 等。

Luckily for you, I happen to have the key.

你真幸运，我正好带了钥匙。

3. 介词短语作插入语

of course, in short, as a matter of fact, by the way, On the contrary, on the other hand, in my opinion, in conclusion等。

On the contrary, we should strengthen our ties with them.

相反，我们还应加强和他们的联系。

4. 现在分词短语作插入语

generally speaking, judging from/ by ..., talking of..., considering...等。

Considering his age, he did very well.

从年龄考虑，他干得挺不错。

5. 过去分词短语作插入语

*这种过去分词是独立的，没有逻辑主语。

Painted white, we like the house better.

漆成白色，我们更喜欢这房子。

6. 动词不定式作插入语

to be sure, to be frank, to tell you the truth, so to speak等。

To be frank, I don’t quite agree with you.

坦率地说，我不太同意你的意见。

7. 代词词组作插入语

all the same, all in all等。

All in all, her condition is greatly improved.

总的来说,她的情况有很大好转。

8. 句子作插入语

I I think /hope / believe, you know / see, what’s more, that is (to say), I’m afraid, do you think / suppose等。

It’s a great mistake, I think, not to accept their proposal.

我认为，不接受他们的建议是个很大的错误。

9. 从句作插入语

if so / not / any, if I may say so, if you don’t mind, as you know, as you say 等。

This man, as you know, is good for nothing.

正如你所说的，这个人是一无所长。

10. 用标点符号引导插入语

He was (strange as it seems) an excellent sportsman.

他（尽管还显得令人不解）是个出色的运动员。（用括号引导）

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