become:开始变得，变成1. 不规则动词：动词原形/过去式/过去分词：become/became/become2.系动词，后面可以接形容词/名词/过去分词作表语：become+adj/doneHow could he become a good dancer 他怎么能成为一名优秀的舞蹈演员？The leaves became green.树叶变绿了。

The meeting room becomes crowed.会议室变的拥挤了。3.become可以用在进行时It is becoming more and more convenient for us to communicate by phone.我们通过电话交流变得越来越方便。4.become作为系统词，不可以用于被动语态；视5.become是短暂性动词，不可以和表示时间段的状语连用，如for,sinceThe company has become the first in the industry for ten years.这个公司10年来已经成为行业第一。（错误）正确表达The company became the first ten years ago.这个公司10年前就成为了行业第一。It is ten years since the company became the first in the industry.6.become of sb/sth: 变得怎么样， 发生什么，遭遇什么，结果如何。通常和what,whatever连用what became of your students 你的学生怎么样了？常见系动词总结是： be;保持：keep, stay, remain;变化：become, get ,grow, turn, go, come；(可用现在进行时)感官：feel，smell，sound，taste，look；其他： prove, turn out, seem注意点(1)后面放形容词/名词；(2)无被动语态(3)通常不用于进行时(除表示变化类系动词