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Yesterday, I went to a shop. 状语 完整句 一个词的状语叫副词 一个句子的状语叫状语从句 状语放句首： Yesterday, I went to a shop. 一定用逗号隔开 句尾： I went to a shop yesterday. 不用逗号 句中：（作插入语） 插在主谓语之间 , 双逗号 I , yesterday, went to a shop ·_____ they decide which college to go to, students should research the admission procedures. 开头打逗号，一定状从 ·区分状从和其他从：状从位置灵活，放哪里都可，试一下 主将从现（主句和从句） ！！！不是只有这几个是接状从的，since，as 之类还有很多 时间状从 (1)when, while (2)before (by the time), after (3)till, until (4)once,assoon as 条件状从 (5)if, unless (6)As long as, so long as, provided that, providing that 只要 将： 主将从现 将来时（将完也行） 主情从现 情态动词 主祈从现 祈使句 I will tell you the secret when you arrive Come here if you arefree tomorrow You can’t leave here unless you arefree tomorrow 现：现在完成 / 一般现在 都行 ， 但是主句和从句如果是同时发生的只能选 一般 有先后性就选现完 （1）when while as 和 since 不是状从，不能主将从现 when while as 的辨析 while：+ 延续 v when : +延续v /点v when 和while 同时出现定选when as 要求 主从动词是同时出现的，同步的 do as do ，as 可以翻译成 随着，一边。。一边。。。 (2)before (by the time), after before it was 时间段 before 。。。。（时间段之后 。。才。。。） 三年之后我才意识到我错了 it was 3 years before I knew my mistake. it will be 时间段 before 。。。 （将会是时间段之后 。。才。。。） 此时才有主将从现 ·不久之后中国会 it won't be long before China ... since 用法：现完 / it is since did 想一想： 1).It is five years _since_______ he finished his research 2). It was five years __before______ he finished his research 3) It was 5 o’clock __when______ he finished his research 时间点 4) it was at 5 o’clock _that_______ he finished his research 强调句 5) it’s five years _since____ he finished his research it's 只能是it is和it has 的缩写，it was 没有缩写 by 作介词 by +时间 = before ＋时间 ≤ ＜ 不晚于 I have remembered 5000 words by now 至今为止 I had remembered 5000 words by 1998 到1998年为止 I will have remembered 5000 words by 2050 到2050年为止 作连词 加时间状语从句， 意思和上面一样，但是要写成by the time by the time+时间状语从句 ·I had remembered 5000 words by the time I came here in 1998 ·I will have remembered 5000 words by the time I leave in 2050 ·By the time we_ take____ (take) College Entrance Exam in three years, we _will_have mastered_________more than 3,500 words.(master) 定义(一) 8字箴言：过去结束；因果影响 （对现在有影响，还是因果影响） 何为因果 ·You _have missed____ your turn so you’ll have to wait. 定义(二):谈论至今经历 找关键词 so far by now up to now 到目前为止 up till now as yet=yet to date before（ now） over / in the past 3 years 在过去的三年中到今天为止 ever never twice it is first/last time that sb have down sth 这是某人到今天为止第一次/最后一次做某事 （3）until until 明天 直到明天，是时间段--------------------until 加时间状语都是时间段，要求前面的动词是持续性 点动词的否定也是持续性动词 （4）once /as soon as + 从句 一。。。就。。。主将从现 =the moment /the minute/ imediately/ instantly +从句 （这些词直接当连词使用，中间不用再加that 之类连词） ·Fortunately somebody who happened to be passing by called fire department __instantly__ the fire broke out. no sooner ...than / hardly….when +从句 一。。。就。。。 不主将从现且从句只能用在过去时，不用在现在时 no sooner 过去完成 than 过去式（一定！） 我一到家，电话就响了。 I have no sooner arrived home than the phone rang. I have hardly arrived home when the phone rang. 因为先到家，电话再响，响是rang， 那到家更早，得是have arrived 条件状语 (5) if /unless 如果/除非 unless=if not (6)As long as, so long as, provided that, providing that |
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