高一英語：知識點總結Unit11-12(15)
(4)thanks to 這一短語介詞，含有“幸虧、多虧、虧得、
-- Do you know bow much the room costs?
你知道這房間花費多少嗎?
-- Yes, I do. / No, I don't.
知道。/不知道。
-- How much do you think the room costs?
你認為這房間會花多少錢?
-- I think the room costs 300 dollars.
我認為會花300美元。
2. You want to buy a CD for your friend's birthday but
you are not sure what to buy.
你想為朋友的生日買一張CD，但你拿不準該買什
么。
be sure 后可接不定式及從句。如：
John is sure to pass the exam.
約翰一定能通過考試。
He is sure that the party will be a success.
他確信這次聚會能獲得成功。
[注意] be sure 后接名詞、代詞、動名詞時需用介詞of
或about。如：
You may be sure of his honesty.
你可以確信他是誠實的。
I think he lives at No. 23 West st., but I'm not sure
about the number.
我認為他住在西大街23號，但對這個號碼我不能肯
定。
[比較]be sure to do 與 be sure of doing
John is sure to pass the exam.
說話人確信約翰能通過考試。
John is sure 0f passing the exam.
約翰本人確信自己能通過考試。
[提示] be not sure后常用whether / if, what, when,
where 等引起從句，有時也用that。如：
I'm not sure whether / if he will come to see me.
我拿不準他是否會來看我。
I was not sure what I ought to do.
我拿不準該干什么。
[辨析] sure 與 certain
certain 一般可與sure換用，但在It is certain that...
中不用sure。如：
It is certain that our team will win the game.
我們隊肯定能贏得這場比賽。(不用sure)
3. You want t0 find a good song to dance to.
你想找一首好歌來伴舞。
① to dance to 是不定式作定語，修飾名詞song，并與
之形成動賓關系，這時的不定式應為及物性的，若動
詞不及物，則應加上適當介詞。如：
New York is a nice place to visit.
紐約是個游覽的好地方。
Could you find me a chair to sit on?
能給我找把椅子坐嗎?
② dance to中的to表示“伴隨，按照”。如
He likes to sing to the piano.
他喜歡鋼琴伴唱。
Please add salt to taste.
請按口味加鹽。
The map was drawn to scale.
這地圖是按比例繪制的。
(責任編輯：康彥林)
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