??? 情景例句
At 4, but I have to leave by 3:00 to get there on time.
四點(diǎn)，不過(guò)我三點(diǎn)必須離開(kāi)，才能準(zhǔn)時(shí)到那里。
Then, all of a sudden, it became cloudy and began to rain.
可是突然天就變了，烏云密布并下起雨來(lái)。
Yes, very nice, thank you.
是的，非常愉快，謝謝。