英语 once和twoice的用法

串错了字 twoice --> twice
Once 代表一次,曾经,一旦
-- 副词 adverb
-- 名词 noun
-- 连接词 conjunction
1) I see them once every two months.
2) Once is enough.
2) Once you get into a bad habit,you'll find it hard to get out of it.
Twice 代表两次,两倍
-- 副词 Adverb
1) He comes to work twice a week.
2) The dining-room is twice as big as the kitchen.

是once和twice吧？？

没什么特别的，用法举例：
I watch TV once a day.
I play basketball twice a week.
另外once还有一旦的意思，可根据句意判断出来。是从语法上说

一、once的用法总结
1. once用作连词时，意为“一旦……就……”，用
接
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