学好知识就需要平时的积累。知识积累越多，掌握越熟练，精品学习网编辑了九年级英语Unit3知识点：第三单元，欢迎参考!

1. allow sb. to do sth. 允许某人做某事(主动语态)如：

Mother allows me to watch TV every night. 妈妈允许我每晚看电视。

be allowed to do sth. 被允许做某事(被动语态)如：

LiLy is allowed to go to Qinzhou. 莉莉被允许去钦州。

2. get their ears pierced 穿耳洞

让/使(别人)做某事　 get sth. done(过去分词)

have sth. done 如：

I get my car made. == I have my car made. 我让别人修好我的车

3. enough 足够

形容词+enough 如：beautiful enough　足够漂亮

enough+名词　如：enough food 足够食物

enough to 　足够…去做…　如：

I have enough money to go to Beijing. 我有足够的钱去北京。

She is old enough to go to school.她够大去读书了。

4. stop doing sth. 停止做某事　Please stop speaking.请停止说话。

stop to do sth. 停止下来去做某事　Please stop to speak.

请停下来说话。

5. 看起来好像…sb. seem to do sth. He seems to feel very sad.

it seems that +从句It seems that he feels very sad. 他看起来好像很伤心。

6. 系动词不能独立作谓语，要和表语一起构成谓语。常用的连系动词有：look, feel, be, become, get, turn, smell, taste, stay(保持), kept等。连系动词除be 和become 等少数词可接名词作表语外，一般都是接形容词。　如：

They are very happy. He became a doctor two years ago.

She felt very tired.

通过对九年级英语Unit3知识点：第三单元的学习，是否已经掌握了本文知识点，更多参考资料尽在精品学习网!

相关链接：

九年级英语知识点整理：第三单元  

九年级英语Unit2知识点：第二单元