they can be used to greet 英文問題
they can be used to greet a friend or relative
- DaSaGwaLv 78 年前最佳解答
"be used to" is in passive voice, so "to" is not a preposition, but uses with "be used" to form an infinitive. It means "過去曾經如何如何"
However, if you use it this way:
He is not used to walking for a long distances.
in the above sentence, "to" is a preposition, so you will following with
noun, pronoun, or noun equilibrium (such as V-ing,...), it means "習慣於
2012-06-13 22:33:50 補充：
I just found that this kind of question was answered very nicely at:
2012-06-14 01:35:52 補充：
If your sentence is written as:
They are used to greeting a friend and relative.
then you will use "greeting".
2012-06-14 01:38:48 補充：
However, your questioned sentence uses "can be used to greet". It means "something are used to greet". In Chinese "它們可以被用來迎接朋友或親戚".
2012-06-14 01:39:26 補充：
In the above case, "to" is to form infinitive, like "to greet", not a preposition.
2012-06-14 01:42:54 補充：
Of course, if in the sentence "they are used to greeting a friend or relative", "are used to" means "被用來", then you still need to follow with V, not V-ing. To precisely determine the function of "to", you need to have the context and the feeling of English.
2012-06-14 01:43:41 補充：
Telling you all these rules without the context and the feeling, you might get even more confused.
2012-06-14 01:45:29 補充：
The only way to get it right is to practice and read more.參考資料： self