双写辅音字母+ed. 如:plan, stop,drop,fit(适 合), prefer(更喜欢), travel 4.以辅音字母+y,结尾,变y为i+ed try, study, carry, hurry, cry, worry,copy
1.肯定句:
主语+have/has(助动词)+过去分词+(其他)。
5. Sally joined the League two years ago.
Sally _______________ the League for two years.
has been in
比较延续性动词与瞬间性动词
延续性动词:表示可以延续一段时间的动作或状态。如: be,drink,fly,eat,keep,lie,live,rain等。 瞬间性动词:表示不能延续的动作,即动作发生后立即结束。如:
6. He left here 2 years ago.
--- He has been away from here for 2 years.
7. The film began 30 minutes ago. --- The film has been on for 30 minutes.
3.The meeting began two minutes ago.
The meeting __h_a__s_b_e_e_n__o_n_____ for two minutes.
4.We borrowed two books last week.
We __h_a__v_e_k__e_p_t____ the two books for a week.
They have left. --他们已经离开了,也就是说现在他们人不在这里 I have had my lunch. --我已经吃过午饭了,也就是说我现在不饿