|
(2)during表示“在……期间” He visited many nice places during his stay here.在他逗留期间他参观了许多美丽的地方。 What did you do during the summer vacation?你在暑假做了什么? (3)through表示“一直……，自始至终” They worked hard through the winter.整个冬天他们都在努力工作。 She treated me like her brother through these years.这些年来她始终把我当哥哥对待。 3.from, since (1) from表示“等时间的起点”，作“从……”解，多用于“from…to/till…”中。 You can come any time from Monday to Friday.周一至周五你什幺时间来都行。 The exam will start from 9:00 a.m.考试将从上午九点开始。 ①from“从……(开始)”未必持续到现在，如： from 1995 to 1998.从1995年到1998年。 而since是指“自从……以来一直持续到现在” ②since一般只与现在完成时连用，而from不受此限。 (2)since表示“自从……以来(直到现在)” He has been away from home since 1973.他自从1973年就离开了家乡。 We have known each other since ten years ago.我们十年前就认识了。 for与since表示一段时间，但for与时间段连用，而since与时间点连用。 如for two hours(持续)两小时;since last week自从上周直到现在 4.before, by, till, until (1)before指“在……之前” Please come before ten o’clock.请10点以前来。 The meeting will end after 3:00 p.m. 会议将在下午三点后结束。 表示“在……以前”时，before与by基本可通用。但by还有“截至……为止”之意，此时可与完成时连用，而before一般不与完成时连用。如： How many models have you made by the end of last month? 截至上月底你做了多少个模型? (2)by指“不迟于，到……时为止，在……以前” I must finish my home work by lunch.午饭前我必须做完作业。 We had learned over 1000 words by the end of last term. 到上学期末为止，我们已经学了1000多个单词了。 (责任编辑：admin) |