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 用來說明動作起始時間，for用來說明動作延續時間長度。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 作為時間狀語的句子都用現在完成時。
I worked here for more than twenty years. (我現在已不在這里工作。)
I have worked here for many years.(現在我仍在這里工作。)
注意：用句型轉換的方法，很容易排除非延續動詞在有for/since結構的完成時中的誤用。
1)(對) Tom has studied Russian for three years. = Tom began to study Russian three years ago, and is still studying it now.
2)(錯) 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，它應改為 Harry got married six years ago. 或 Harry has been married for six years.
同學們，看看since和for的用法比較，大家有沒有清楚一點呀，多多看看哦。
初中英語分詞與連詞的語法
【分詞與連詞的】在學習的時候需要注意的是，分詞的主語和主句的主語必須為同一個哦！
有時為使分詞短語與主句關系更清楚，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，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：同學對這個如果還不是很理解的話，就不可以再偷懶了哦！
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