今天小编肥嘟来为大家解答以上的问题。since的用法四种句型，since的用法相信很多小伙伴还不知道,现在让我们一起来看看吧！

1、since的四种用法 　 1) since +过去一个时间点　(如具体的年、月、日期、钟点、1980, last month, half past six)。

2、 　 I have been here since 1989. 　 　 2) since +一段时间+ ago 　 I have been here since five months ago. 　 3) since +从句　 　 Great changes have taken place since you left. 　 Considerable time has elapsed since we have been here. 　 4) It is +一段时间+ since从句 　 It is two years since I became a postgraduate student.。

本文就为大家分享到这里，希望小伙伴们会喜欢。