在日常學習、工作或生活中，大家總少不了接觸作文或者范文吧，通過文章可以把我們那些零零散散的思想，聚集在一塊。那么我們該如何寫一篇較為完美的范文呢？下面是小編為大家收集的優秀范文，供大家參考借鑒，希望可以幫助到有需要的朋友。
sincere的比較級和最高級篇一
英語的應用越來越廣泛了，我們必須好好來學習英語知識。對此小學頻道編輯為大家整理了小學六年級英語語法講解：。詳情如下：
i have lived here for more than twenty years.
i have lived here since i was born.
my aunt has worked in aclinic since 1949.
some new oil fields have beeno pened up since1976.
i have known xiaoli since she was a little girl.
my brother has been in the youth league for two years.
ihavenotheardfrommyuncleforalongtime.
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。)
當現在完成時+一段時間，這一結構中，我們用下面的.公式轉化，很容易就能排除非延續動詞在完成時中的誤使。
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.
希望大家能夠認真閱讀這篇小學六年級英語語法講解：比較since和for，以便在英語學習上取得優異的成績。
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