谁英语好帮忙解决个问题

Question

句型转换:
I paid 5 yuan for the pen.
_____ ______ me 5 yuan to buy the pen.
答案是It took
我想知到答案为什么不是It cost
我记得好像有这句型:cost sb some money to do st

Answer 1

因为同意句转换要求时态不变，I paid 5 yuan for the pen.
是一个一般过去时的陈述句，所以答案也应该是一个一般过去时的句子，所以答案是It took，而不是It cost。

Answer 2

既没有take sb some money to do 也没有cost sb some money to do st
关于花费。
it takes sb sometime/money to do sth。是固定句型。做某事花了某人多少时间或钱。
cost的用法是 sth. cost sb sometime/money
spend用法是 sb spend time/money doing sth.或on sth.

Answer 3

sth cost sb somemoney...
但是这里用形式主语it,因此使用另一固定句式
it take sb somttime/somemoney to do sth

Answer 4

sth cost sb somemoney
但是现在sth在后面，所以只能是
it take sb somttime/somemoney to do sth

Answer 5

it take sb +时间/金钱to do sth
而不是用cost 或者是spend 5yuan on the pen.