become 和 turn 的区别Happy birthday,Alice! So you have ____ twenty-one already!A. become B. turn.该用哪一个?为什么?

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become 和 turn 的区别Happy birthday,Alice! So you have ____ twenty-one already!A. become B. turn.该用哪一个?为什么?
become 和 turn 的区别
Happy birthday,Alice! So you have ____ twenty-one already!
A. become B. turn.
该用哪一个?为什么?

become 和 turn 的区别Happy birthday,Alice! So you have ____ twenty-one already!A. become B. turn.该用哪一个?为什么?
turn twnety-one
turn在此句中的意思是“(时刻等)超过,逾”这是特殊搭配,死记!
He has turned fifty.他已经五十岁了.
It has just turned half past two.
现在刚过两点半.
又及:
(1)作为系动词,turn也可以在后面接形容词做表语,但它经常表示“从某种状态向其对应的状态变化的自然现象”.例如:
The weather has turned much warmer.
天已经变得温暖多了.
注意:turn后面还可以接名词的原形作表语.例如:
That poor boy turned writer twenty years later.
二十年后,那个穷孩子成为一名作家.
(2)become作为系动词使用时,强调变化过程的持续性.例如:
Gradually the boy became silent.
那个男孩渐渐变得沉默寡言了.
注意:become后也可以接名词作表语,但它后面的名词为普通用法.例如:
That poor boy became a writer twenty years later.
二十年后,那个穷孩子成为一名作家.
You will become a college student if you study hard.
如果努力学习,你会成为一名大学生的.

选A
两者虽然都有变成、成为的意思,但是become强调的是已经成为,强调状态已经是事实,turn强调过程,尤其是一个缓慢的过程,所以一般都说the tree is turn green,因为树不是在瞬间变绿的,是一个缓慢的过程。

become:成为. 虽然外表是另一个了,可本质没有变.
turn:成为. 由一种状态转变成另一种状态.
故你的题目应该选择A.