1,does he have to practice speaking english every day.为什么speak要加ing?2,我不得不在六点以前到家i have to get home by 6 o'clock"以前”为什么没有before这个单词?为什么用by不用at?3,we had fun riding our bikes to the be

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1,does he have to practice speaking english every day.为什么speak要加ing?2,我不得不在六点以前到家i have to get home by 6 o'clock
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1,does he have to practice speaking english every day.为什么speak要加ing?2,我不得不在六点以前到家i have to get home by 6 o'clock"以前”为什么没有before这个单词?为什么用by不用at?3,we had fun riding our bikes to the be
1,does he have to practice speaking english every day.为什么speak要加ing?2,我不得不在六点以前到家
i have to get home by 6 o'clock"以前”为什么没有before这个单词?为什么用by不用at?3,we had fun riding our bikes to the beach today为什么rid要加Ing?

1,does he have to practice speaking english every day.为什么speak要加ing?2,我不得不在六点以前到家i have to get home by 6 o'clock"以前”为什么没有before这个单词?为什么用by不用at?3,we had fun riding our bikes to the be
1.practice 后必须跟动名词作宾语.
2.by 在……之前.用at来表示在某一时刻,at 4∶30在4点30分;
by a time＝at that time or before／not later than that time
在那一时刻或在那一日期或不迟于那一日期
这种表示方法常暗指在那一时刻之前
The train starts at 6∶10,so you had better be at the station by 6∶10.
火车6点10分发车,所以你最好在6点10分之前到达火车站.
3.have fun doing sth.:做某事很开心 = have a good time doing sth.= enjoy
doing sth.

practice doing sth 固定搭配
如果用了by就不用before，用before就不用by at+具体时间是指具体某一时间点，而by+具体时间的意思是到了某一时间，有一段延缓的时间，而不是就是那个时间点
have fun doing sth 也是固定搭配
希望对你有帮助

He didn’t pass the final examination.He ______ it.选项:a、must have prepared for b、ought to pr What does he have? Does he have to wear a uniform at school.翻译 he does not s____ to have many friends 连词成句.what,is,does,do,have,to,he? He does not have to speak in class. Does he usually___lunch at home?A.has B.have C.to have D.to has Where does he have lunch? does,have,headache,he,a,) when does he have history? Does he have a son. if he does't keep quiet,he'll have to leave the library.保持句子意思 He does't seem to have many friends=_____ ______ that he _____ have many friends Does he have a _____(网球)?Yes,he does.xiexie 1.What does your father do?2.What time does he get up,go to work,have lunch...3.Does he like his job? ____Tom___help his father in the gardon?---I'm afraid he have toA,Does,need B.Has,need to C.Does,have to D.Has,has to Does he want to have a picnic 的同义句____ he ___ to ___ ____ a picnic? Does he often have to go to the doctor?为什么要加the啊`have在这里什么意思