Kate used to watch TV.
附用法：
used to do 過去常常（表示現(xiàn)在不再）
used to do過去常常,過去曾經(jīng)；過去常常做某事
He used to do his homework on Sunday, but now he often does homework on Saturday.
他過去在星期天做家庭作業(yè),但是現(xiàn)在他經(jīng)常在星期六做作業(yè).
eg: I used to swim in the lake near my village when I was young.
be used to doing習(xí)慣于做某事
eg: My grandpa is used to going for a walk after dinner.
be used to do 被用于.
eg: Wood can be used to make paper
"I used to do this rather regularly, particularly with shoplifters, " the judge said.
“我以前經(jīng)常這么判決,特別是對(duì)那些商店扒手,”法官說.
有一點(diǎn)需要補(bǔ)充.在選擇題中看到be used to時(shí),應(yīng)當(dāng)首先根據(jù)句子判斷其所要的意思是什么,然后在決定選哪一個(gè)．另外,當(dāng)習(xí)慣做某事時(shí),由于to是介詞,所以要加動(dòng)名詞doing；而be used to do sth.是使用的被動(dòng)語(yǔ)態(tài),所以后面加動(dòng)詞原型．另外,如果強(qiáng)調(diào)漸漸適應(yīng),還可以用get used to doing sth