1what do you mean by saying that 中的BY可用with 或者for代替吗,

题目

1what do you mean by saying that 中的BY可用with 或者for代替吗,
2i went to beijing by plane for the first time when i was 20,这里为什么不可以用with ,我感觉用witn的意思要比for更好啊,
3she can get so much fun with reading这里的with 可以换成for ,to ,by吗,
ps,(详细回答啊)我现在对这些介词搞混了,可以帮我理解吗,最好 有例句啊,

答案

1.不可以 .what do you mean by doing sth 是很常用的固定句式,指 eg.What do you mean by giving me this letter?2.你把 for the first time 提前到句首,就明白了.for the first time 其实也是固定的,指第一次做某...