1 promise vt. 保證，許諾。有三種結(jié)構(gòu)：

　　1)promise to do sth. _____My mother promised to buy a piano for me.

　　2)promise sb. sth. _____ My aunt promised me a bike.

　　3)promise + that 從句_____ Tom promises that he can return on time.

　　promise n. 允諾， 諾言

　　Lily is a dishonest girl. She never keeps a promise.

　　2.when 與 while 的區(qū)別：

　　when 表示“當(dāng)…時(shí)候”，既指時(shí)間點(diǎn)，又指一段時(shí)間，when 引導(dǎo)的時(shí)間狀語從句中的動(dòng)詞可以是終止性的也可以是延續(xù)性的。When the teacher came in, the students were talking.

　　When she arrives, I’ll call you.

　　while 表示“當(dāng)…時(shí)候”，僅指一段時(shí)間，從句中的動(dòng)作必須是延續(xù)性的，一般強(qiáng)調(diào)主從句的動(dòng)作同時(shí)發(fā)生， while 還可以作并列連詞，意為“ 而、卻”，表示對(duì)比關(guān)系。

　　Lisa was singing while her mother was playing piano.

　　Tom is strong while his younger brother is week.

　　3. practice vt. 練習(xí)， 后接名詞，代詞或v-ing 作賓語。

　　Your elder sister is practicing the guitar in the room.

　　常跟v-ing 作賓語的動(dòng)詞有：

　　考慮建議盼原諒：consider, suggest/advise, look forward to, excuse, pardon.

　　承認(rèn)推遲沒得想： admit, delay/put off, fancy.

　　避免錯(cuò)過繼續(xù)練：avoid, miss, keep/keep on, practice.

　　否認(rèn)完成能欣賞： deny, finish, enjoy, appreciate.

　　不禁介意與逃亡： can’t help , mind, escape.

　　不準(zhǔn)冒險(xiǎn)憑想象： forbid, risk, imagine.

　　4. everyday 與 every day 區(qū)別

　　everyday adj. 每天的 在句中作定語，位于名詞前。 This is our everyday homework.

　　every day 副詞短語， 在句中作狀語，位于句首或句末。 He reads books every day.