急！！！ take over take up take on take off 都是什么意思？ 谢谢

take over 接管
take up

1.开始从事
When did he take up football?
他是什么时候开始踢足球的?
2.占用;化去
The work took up all his time.
take off

1.脱下;移去
He took off his raincoat and took out the key.
他脱下雨衣,拿出钥匙。
2.起飞
The plane will take off soon.
飞机马上就要起飞了。
3.休假
He took two weeks off in August.
他在八月份休假了两个星期。
take on
1.穿上;呈现
The insect can take on the color of its surroundings.
这种昆虫能随环境而变色。
2.承担
He is unwilling to take on heavy responsibilities.
他不愿承担重任。
那工作花费了他所有的时间。

take over 接任，接管，接收
take up 开始从事，专注于
take on 雇佣，聘用，开始显现，变得有与人较量
take off 脱掉（衣服），模仿（别人的神态），（飞机）起飞

take up和take on差不多。前者是”开始从事“，后者是”承担“。
take over是”接管“。
take off作不及物动词是”腾飞“，作及物动词是”脱下“。