表示"時(shí)間"的詞組：
（1）下課后：

after class

after class

放學(xué)后：

after school

after school

（2）在上學(xué)的白天：

on the daytime of weekdays

on the daytime of weekdays

（3）到晚上10點(diǎn)鐘之前：

by

by

10 o'clock p．m．