一定要知道英语语法_小升初复习_小升初-查字典英语网

Im not sure why he came.

Im not clear where she went.

4. 有关worth; worth while; worthy的句型如下：

(A) 主词(含it) + be worth + (动)名词

(B) It(虚主词) + be worth while + 不定词或动名词

主词 + be worthy + 不定词

This book is worth reading. (= It is worth while to read this book. = This book is worthy of reading. = This book is worthy to be read.)

5. like和as： like只能作介词不能作连接词; as则两者都可。

I hoped to succeed as you have (succeeded)。

I hoped to succeed like you.

I hope to succeed *like you have. (like作连词是非正式的用法)

冠词 (三)

1. 不定冠词的用法：

(1) a用在子音前; an用在母音前。

An hour

(2) 表同种类的全体，此时a带有any的意味。

A dog is a faithful animal. (=Dogs are faithful animals.)

(3) 等于one.

I have a sister and two brothers.

(4) 等于the same.

Birds of a feather flock together.

(5) 等于per每一。

We work eight hours a day. Ninety miles an hour;

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