新东方在线小学网整理了2017年小升初英语语法大全，供同学们参考，希望能够帮助同学们提高学习成绩。

　　小升初英语语法省略句知识点：if类省略结构

　　一、if从句省略“主语+be”

　　若if从句的主语与主句主语一致，且if从句的主语后跟有动词be，那么通常可以省略if从句的 “主语+be”。如：

　　If accepted for this post， you will be informed within a week.= If you are accepted for this post， you will be informed within a week.

　　如果你被接受担任这个职务，将在一礼拜内给你通知。

　　If traveling north， you must change at Leeds.=If you are traveling north， you must change at Leeds.

　　如果你是向北行，你必须在里兹换车。

　　If in doubt， ask your doctor. He can give you further information.=If you are in doubt， ask your doctor. He can give you further information.

　　你若有疑问，可以问问医生，他会向你作进一步的说明。

　　If about to go on a long journey， try to have a good night’s sleep.= If you are about to go on a long journey， try to have a good night’s sleep.

　　如果你要长途旅行，晚上就好好睡一觉吧。