初中英語語法用法講解

　　【語法since和for用法講解】

　　比較since和for

　　Since 用來說明動(dòng)作起始時(shí)間，for用來說明動(dòng)作延續(xù)時(shí)間長(zhǎng)度。例如：

　　I have lived here for more than twenty years.我住在這兒二十多年了。

　　I have lived here since I was born. 我從出生起就住在這兒了。

　　注意：并非有for 作為時(shí)間狀語的句子都用現(xiàn)在完成時(shí)。

　　I worked here for more than twenty years. (我現(xiàn)在已不在這里工作。)

　　I have worked here for many years.(現(xiàn)在我仍在這里工作。)

　　注意：用句型轉(zhuǎn)換的方法，很容易排除非延續(xù)動(dòng)詞在有for/since結(jié)構(gòu)的完成時(shí)中的誤用。

　　1)(對(duì)) Tom has studied Russian for three years. = Tom began to study Russian three years ago, and is still studying it now.

　　2)(錯(cuò)) Harry has got married for six years. = Harry began to get married six years ago, and is still getting married now.

　　顯然，第二句不對(duì)，它應(yīng)改為 Harry got married six years ago. 或 Harry has been married for six years.

　　同學(xué)們，看看since和for的用法比較，大家有沒有清楚一點(diǎn)呀，多多看看哦。

　　初中英語分詞與連詞的語法

　　【分詞與連詞的】在學(xué)習(xí)的時(shí)候需要注意的是，分詞的主語和主句的主語必須為同一個(gè)哦！

　　有時(shí)為使分詞短語與主句關(guān)系更清楚，可在分詞前加連詞。 連詞有： when，while，if though，after, before, as. 但分詞的主語和主句的主語必須為同一個(gè)，如：

　　While waiting there, he saw two pretty girls come out of the building.

　　waiting 和saw 的主語相同。

　　溫馨提示：同學(xué)對(duì)這個(gè)如果還不是很理解的話，就不可以再偷懶了哦！

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