what time 和 when 有何分別？何時選用那一個？

如果你係想問:
當問關於時間既問題既時候點分??

what time 就係一定要人地答到個實際時間
when就唔一定,人地可以答一d相對既時間

例:
A: What time will you leave?
B: I'll be leaving at 5pm

A: When will you leave?
B: I'll be leaving soon.
或者 I'll be leaving after I finish all my work.

如果問人宜家幾點,唔可以講when is it now? 要講what time is it now?
(不過其實多數講 what's the time now)

what time do you go to bed?
Ans: I usually go to bed at 11. (okay)
Ans: I usually go to bed after watching the late news. (雖然grammer冇錯,但係唔可以咁答)

when do you go to bed?
Ans: I usually go to bed at 11. (okay)
Ans: I usually go to bed after watching the late news. (okay too)

what time 是指何時 , 指定某時 , 問對方實際時間
when 意指是在什麼時候 , (情境) e.g. after lunch , at night, after have a bath.....

what time係什麼時候when係當。

Q1係　　你幾時訓覺？
Ｑ２係　你咩時候訓覺？

二者大有小小分別