何時的用法和樣例：
例句
-
你何時去交易會？明天還是另找哪一天？
When will you go to the Fair, tomorrow or some other day? -
你知道火車何時開嗎？
Do you know when the train will leave? -
你猜飛機何時要起飛？
When do you guess the airplane will take off? -
這項法律何時生效？
When will the law take effect? -
你何時開始學習英語的？
When did you begin learning English? -
這項新法律何時生效？
When does the new law come into operation? -
新制度何時生效？
When does the new system become effective? -
你的駕駛執照何時到期？
When does your driving licence expire?
