第1个回答 2017-02-15
三个正确的短语形式是
at first 起初,在刚开始时
the first time 第一次(做某事)
for the first time 第一次(做某事)
例如
At first,they were good friends.
The first time they met each other,they becam good friends.
They became good friends for the first time they met each other.