【用法詳解】
一、used to
(一)基本用法
used to do用來(lái)表示過(guò)去常常或習(xí)慣做某事，所以在使用時(shí)，關(guān)鍵是要判斷所要描述的動(dòng)作是否發(fā)生在過(guò)去。如：
他小時(shí)候在一家小鋪里工作。
上句中的“小時(shí)候”說(shuō)明動(dòng)作發(fā)生在過(guò)去，所以可以這么翻譯：
As a boy he used to workin a small shop.
再比如：
他那時(shí)一天通常要工作14個(gè)小時(shí)。
上句中的“那時(shí)”說(shuō)明動(dòng)作是發(fā)生在過(guò)去的，所以可以這么翻譯：
At that time he used to work fourteen hours a day.
(二)句型轉(zhuǎn)換
used在英語(yǔ)語(yǔ)法里也被稱(chēng)作半情態(tài)動(dòng)詞，因?yàn)樗瓤梢杂米髑閼B(tài)動(dòng)詞，也可以用作實(shí)義動(dòng)詞，所以在進(jìn)行句型轉(zhuǎn)換時(shí)要注意到底是哪種情況。
1、用作情態(tài)動(dòng)詞時(shí)
這時(shí)，used的用法就跟can/must等差不多了。如：
肯定句：He used to smoke a lotwhen he was in the college.
否定句：He usedn't to smoke a lot when he was in the college.
一般疑問(wèn)句及其回答：Used he to smoke a lot when he was in the college? Yes, he used. / No, he usedn't.
2、用作實(shí)義動(dòng)詞時(shí)
這時(shí)，它的用法就跟其他實(shí)義動(dòng)詞一樣了。如：
肯定句：He used to smoke a lot when he was in the college.
否定句：He didn't use to smoke a lot when he was in the college.
一般疑問(wèn)句及其回答：Did he use to smoke a lot when he was in the college? Yes, he did. / No, he didn't.
二、be used to
be used to有兩種情況：
(一)be used to do
be used to do表示被用來(lái)做某事，屬于被動(dòng)語(yǔ)態(tài)的用法。如：
The pot is used to plant flowers. 這個(gè)陶罐是用來(lái)種花的。
(二)be used to doing
1、基本用法
be used to doing表示的是現(xiàn)在常?；蛄?xí)慣做某事，與used to do不同的是，be used to doing中的to是個(gè)介詞，所以后面跟動(dòng)詞時(shí)，要用動(dòng)名詞形式，而used to do中的to是不定式。如：
She is used to talking nonstop when she is excited. (她興奮時(shí)總愛(ài)說(shuō)個(gè)不停。)
2、句型轉(zhuǎn)換
與used to do不同的是，be used to doing中的be是助動(dòng)詞，所以在進(jìn)行句型轉(zhuǎn)換時(shí)，主要通過(guò)be的變化和調(diào)整來(lái)實(shí)現(xiàn)。如：
肯定句：I am used to drinking coffee during the break at noon.
否定句：I'm not used to drinking coffee during the break at noon.
一般疑問(wèn)句及其回答：Are you used to drinking coffee during the break at noon? Yes, I am. / No, I'm not.
一、used to
(一)基本用法
used to do用來(lái)表示過(guò)去常常或習(xí)慣做某事，所以在使用時(shí)，關(guān)鍵是要判斷所要描述的動(dòng)作是否發(fā)生在過(guò)去。如：
他小時(shí)候在一家小鋪里工作。
上句中的“小時(shí)候”說(shuō)明動(dòng)作發(fā)生在過(guò)去，所以可以這么翻譯：
As a boy he used to workin a small shop.
再比如：
他那時(shí)一天通常要工作14個(gè)小時(shí)。
上句中的“那時(shí)”說(shuō)明動(dòng)作是發(fā)生在過(guò)去的，所以可以這么翻譯：
At that time he used to work fourteen hours a day.
(二)句型轉(zhuǎn)換
used在英語(yǔ)語(yǔ)法里也被稱(chēng)作半情態(tài)動(dòng)詞，因?yàn)樗瓤梢杂米髑閼B(tài)動(dòng)詞，也可以用作實(shí)義動(dòng)詞，所以在進(jìn)行句型轉(zhuǎn)換時(shí)要注意到底是哪種情況。
1、用作情態(tài)動(dòng)詞時(shí)
這時(shí)，used的用法就跟can/must等差不多了。如：
肯定句：He used to smoke a lotwhen he was in the college.
否定句：He usedn't to smoke a lot when he was in the college.
一般疑問(wèn)句及其回答：Used he to smoke a lot when he was in the college? Yes, he used. / No, he usedn't.
2、用作實(shí)義動(dòng)詞時(shí)
這時(shí)，它的用法就跟其他實(shí)義動(dòng)詞一樣了。如：
肯定句：He used to smoke a lot when he was in the college.
否定句：He didn't use to smoke a lot when he was in the college.
一般疑問(wèn)句及其回答：Did he use to smoke a lot when he was in the college? Yes, he did. / No, he didn't.
二、be used to
be used to有兩種情況：
(一)be used to do
be used to do表示被用來(lái)做某事，屬于被動(dòng)語(yǔ)態(tài)的用法。如：
The pot is used to plant flowers. 這個(gè)陶罐是用來(lái)種花的。
(二)be used to doing
1、基本用法
be used to doing表示的是現(xiàn)在常?；蛄?xí)慣做某事，與used to do不同的是，be used to doing中的to是個(gè)介詞，所以后面跟動(dòng)詞時(shí)，要用動(dòng)名詞形式，而used to do中的to是不定式。如：
She is used to talking nonstop when she is excited. (她興奮時(shí)總愛(ài)說(shuō)個(gè)不停。)
2、句型轉(zhuǎn)換
與used to do不同的是，be used to doing中的be是助動(dòng)詞，所以在進(jìn)行句型轉(zhuǎn)換時(shí)，主要通過(guò)be的變化和調(diào)整來(lái)實(shí)現(xiàn)。如：
肯定句：I am used to drinking coffee during the break at noon.
否定句：I'm not used to drinking coffee during the break at noon.
一般疑問(wèn)句及其回答：Are you used to drinking coffee during the break at noon? Yes, I am. / No, I'm not.