could（过去式）、can、be able to 都翻译为“能”,表示先天或后天学到的能力、技能 Could表示过去具备做某事的能力,不表示行...

have + 名词 代替动词，一般用have a 名词。 As we had had a long walk through one of th...

情态动词的意义及构成： 情态动词用来表达说话人的语气和态度，如命令、劝告、建议等。 情态动词有以下两个特点：1. 本身有一定的意义，但不能独立作...

条件句，主语用将来时或祈使句，从句则用现在时。 Last week at a dinner party, the hostess asked m...

直接引语与间接引语 He asked if Mr.Gilbert's operation had been successful and the...

过去完成时 He had no sooner returned than he bought a house and went to live ...

将来完成时：shall（第一人称）/will（第二、三人称）+have+过去分词（done） The Olympic Games will be...

She is going to set out from the french coast at five o'clock in the mor...

Roy Trenton used to drive a taxi.(used to 过去做某事，be used to 习惯做某事） A shor...