✔ 最佳答案
should /ought to都係應該的意思
例如, you should study hard, 你應該努力讀書
doctors ought to save lives, 醫生應該救人
have to, must都係一定的意思
例如, i have to do my homework, 我一定做功課
i must do my homework, 我一定做功課(有一個恆常的意思)
要用這些字來問問題, 可以這樣:
where should i go?, 我應該去邊度
you should go to.........., 你應該去......