<例句>
They were at dinner when I called.
我打電話時他們正在吃飯。
<語法分析>
be+某些介詞短語,在時態(tài)上相當于進行時,這些介詞短語有be at sth.,be in sth.,be under sth.,be on sth.和be after sth.等。在與表示感情的形容詞連用時,at可以代替“聽”、“看”等動詞。在與go,come和return等動詞連用時,for可以代替后面表示“目的”的動詞。for在與start,leave和set等詞連用時,相當于漢語的“走”、“到”、“往”等意思。還有些介詞短語可代替動詞不定式短語,作定語。
<觸類旁通>
(1)What are you at now?
你在干什么?
語法分析:be at sth.表示在干什么事情。
(2)Matter is always in motion.
事物時時刻刻在運動。
語法分析:be in sth.表示進行的事情。
(3)Chickens are on sale.
小雞在出售。
語法分析:be+某些介詞短語,在時態(tài)上相當于進行時。
(4)He was greatly surprised at the bad news.
他聽到這個壞消息大吃一驚。
語法分析:在表示感情的形容詞連用時,at可以代替“聽”、“看”等動詞。
(5)She is also invited to the hall.
她也被邀請參加這個舞會。
語法分析:to在與go,come,invite等動詞連用時,可以代替“出席”、“參加”等動詞。
(6)She has left Japan for America.
她已離開日本去往美國了。
語法分析:for在與start,leave和set等詞連用時,相當于漢語的“走”、“到”“往”等意思。
<鞏固練習>
(1)The students were very glad _____ the film.
(2)She has gone _____ a meeting.
(3)He came _____ his wallet.
(4)I am going out _____ dinner.
(5)She set traps _____ mice.
(6)I'll start _____ England at six early tomorrow morning.
(7)I am _____ the plan.
(8)My brother is _____ school.
(9)It's time _____ breakefast.
(10)She often writes _____ my pen.
(11)I go to work _____ bike.
<參考答案>
(1)at (2)to (3)for (4)for (5)for (6)for (7)for (8)at (9)for (10)with (11)by