用于习语come across，主要用法有：(1) 偶然遇见，碰见（=run across）Where did you come [run] across her? 你在那儿碰到她的?I've just come across a beautiful poem in this book. 我在这本书里偶然发现一首优美的诗。(2) 被理解，被传达（=come over）He spoke for a long time but his meaning did not really come across. 他讲了很长时间，但他的意思没有人真正理解。(3) 使人产生某种印象（=come over）Your speech came across very well. 你的演说相当受欢迎。He came across as sympathetic / a sympathetic person. 他给人以有同情心的印象。注意以下用法，它不是习语，其中的across为副词，表示“在另一边”：Come across to my office this afternoon. 你今天下午到我办公室来一趟。
用一般过去时代替完成时1) 构成will / be going to do sth.2) 概念 a. 状态完成：表示某事继续到将来某一时为止一直有的状态。b. 动作完成：表示将来某一时或另一个将来的动作之前，已经完成的动作或一获得的经验。They will have been married for 20 years by then.You will have reached Shanghai by this time tomorrow.</p 产品：澳博培训供货总量：不限产品价格：议定包装规格：不限物流说明：货运及物流交货说明：按订单
