If you don't study hard, you will not realize your dream.
If you study hard, you will do well in your exams.
If you don't study hard, you will fail your exams.
If you study hard, you will always pass the exams.
If you get up early, you will be healthy.
If you don't get up early, you will not be healthy.
If you get up early, you'll be able to do some morning exercise.
If you don't hurry up, you will miss the bus.
If you hurry up, you will catch the bus.
If you don't hurry up, you'll be late for school.
If you hurry up, you will get to school on time.
2. 請不要在書上亂寫,這句話用英語怎麼寫請不要在書上亂寫，
Please don't write in the books
注：
write 英 [raɪt]
美 [raɪt]
vt. 寫； 寫信； 寫作； 作曲；
[例句]If you'd like one, simply write your name and address on a postcard and send it to us.
如果你想要一個的話，只要把姓名、住址寫在一張明信片上寄給我們就行。
[其他] 第三人稱單數：writes 現在分詞：writing 過去式：wrote 過去分詞：written
