在日常学习、工作或生活中，大家总少不了接触作文或者范文吧，通过文章可以把我们那些零零散散的思想，聚集在一块。那么我们该如何写一篇较为完美的范文呢？下面是小编为大家收集的优秀范文，供大家参考借鉴，希望可以帮助到有需要的朋友。
sincere的比较级和最高级篇一
英语的应用越来越广泛了，我们必须好好来学习英语知识。对此小学频道编辑为大家整理了小学六年级英语语法讲解：。详情如下：
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作为时间状语的句子都用现在完成时。
i worked here for more than twenty years.
(我现在已不在这里工作。)
i have worked here for many years.
(现在我仍在这里工作。)
当现在完成时+一段时间，这一结构中，我们用下面的.公式转化，很容易就能排除非延续动词在完成时中的误使。
1) (对)tom has studied russian for three years.
=tom began to study russian three years ago, and is still studying it now.
2) (错)harry has got married for six years.
=harry began to get married six years ago, and is still getting married now.
显然，第二句不对，它应改为harry got married six years ago. 或harry has been married for six years.
希望大家能够认真阅读这篇小学六年级英语语法讲解：比较since和for，以便在英语学习上取得优异的成绩。
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