现在进行时表示正在发生的动作。 Keep quiet! The baby is sleeping. (安静!娃娃在睡觉。) 现在进行时也表示即将发生的动作。 I m tired. I m going home now. Goodnight! (我累了。我要睡觉了。晚安!) Look! The bus is coming! (看,车来了!) My boss is leaving for South Korea. (我老板马上要去韩国。)
2. 一般现在时
一般现在时表示真理或规律性的动作。 Rice doesn t grow in cold climates. (寒冷的气候不适于水稻生长。) I always go to work by car. (我总是开车上班。) 比较现在进行时与一般现在时:前者表示正在发生的动作,后者表示经常存在的状态。 I can t understand why he is being so selfish. He isn t usually like that. (我不明白他此刻怎么这么自私。他平时不这样。)
3. 一般过去时
一般过去时是简单陈述过去发生的事情。 We invited them to our party but they decided not to come. (我们请了他们参加聚会,但他们决定不来。) I was angry because they were late. (我生气,因为他们迟了。)
4. 过去进行时
过去进行时表示过去某个具体时刻正发生的动作。 I was walking home when I met Dave. (我碰到大卫时,我正往家走。) Tom burnt his hand when he was cooking. (汤姆做饭时烫了手。)
5. 现在完成时
现在完成时表示:刚刚完成的动作;曾经有过的经验;重复发生的过去动作;过去动作或状态延续至今或者强调过去动作对现在的影响。 I have just finished my work. (我刚刚完成我的工作。) I have never been abroad. (我没迈出过国门半步。) I love this movie. I have seen it ten times. (我太喜欢这片子了!看了十遍了,我!) I m hungry. I haven t eaten anything since yesterday. (我很饿了,昨天到现在都没吃过东西。) What a boring movie/film! It s the most boring movie/film I have ever seen. (这电影真没劲!是我看过最糟糕的电影。)
6. 现在完成进行时
现在完成进行时表示从过去开始延续到说话时一直发生的动作。 How long have you been learning English? (你学英语有多久了?) 比较现在完成时与现在完成进行时 Mary is still writing letters. She s been writing letters all day. (马力还在写信,她写了一整天的信。) Mary has written ten letters today. (马力今天写了十封信。)