英语句中几个问题intheirfreetime为什么用inmeetforthefirsttime为什么用forThisisherfirstvisittoBeijing.用thefirsttimeforvisit改写←可能给的短语不对但肯定用for能改写成另一个同义句Ican'tb

Question

英语句中几个问题
in their free time 为什么用in
meet for the first time 为什么用for
This is her first visit to Beijing.用 the first time for visit改写 ←可能给的短语不对 但肯定用for能改写成另一个同义句
I can't believe children are under so much pressure.为什么要用under adv.而不能用standing

Answer 1

in their free time 为什么用in “在他们的空余时间”,一段时间,常用in/ during.
meet for the first time 为什么用for 这个不表示时间段,而是表示“第一次”,要用介词for.这个词组表示“第一次”,在句子里作状语.
This is her first visit to Beijing.用 the first time for visit改写 ←可能给的短语不对 但肯定用for能改写成另一个同义句
It is the first time（第一次,在句子里作表语,所以不象上题样,不用for）for her to visit Beijing.
I can't believe children are under so much pressure.为什么要用under adv.而不能用standing
under在句子里不是副词,而是个介词,意为“在..之下”.
诚然,用standing是可以的.表示“忍受”.