if

If it rains tomorrow morning, the baseball game will be postponed until next week.

(Chinese) 如果明天早上下雨，棒球赛将推迟到下周。

I will buy that expensive laptop if I can save enough money by the end of the year.

(Chinese) 如果到年底我能攒够钱，我就买那台昂贵的笔记本电脑。

She asked if I would like to join them for dinner at the new Italian restaurant.

(Chinese) 她问我是否想和他们一起去那家新开的意大利餐厅吃晚饭。

I'm not sure if the library is open on Sundays during the summer break.

(Chinese) 我不确定图书馆在暑假期间的周日是否开放。