【正文】
while VS when ? while conj. 當(dāng) … 的時(shí)候 ? when conj. 正在這時(shí)(那時(shí)) ? . ? The students were talking when the teacher came into the classroom. ? While the students were talking, the teacher came into the classroom. while VS when ? when, while這兩個(gè)詞都可以引出時(shí)間狀語(yǔ)從句,它們的差別是: when 從句表示某時(shí)刻或一段時(shí)間 ; while 只表示一段時(shí)間。 see sb. do / doing sth. ? see sb. do sth. 看到某人做某事 (強(qiáng)調(diào)全過(guò)程 ) ? see sb. doing sth. 看到某人正在做某事 (強(qiáng)調(diào)正在進(jìn)行 ) . ? I saw him put the key in the lock, turn it and open the door. ? 我看見(jiàn)他把鑰匙插進(jìn)鎖孔,轉(zhuǎn)動(dòng)鑰匙,然后打開(kāi)了門(mén)。s worth seeing [hearing, reading] ? 值得一看 [一聽(tīng) , 一讀 ] ? It isn39。 ? adj. 值 , 相等于 ...的價(jià)值