這篇關(guān)于小學(xué)六年級(jí)英語(yǔ)，是®無(wú)憂考網(wǎng)特地為大家整理的，希望對(duì)大家有所幫助！

　1) since +過去一個(gè)時(shí)間點(diǎn)　(如具體的年、月、日期、鐘點(diǎn)、1980, last month, half past six)。

　　I have been here since 1989.

　　2) since +一段時(shí)間+ ago

　　I have been here since five months ago.

　　3) since +從句

　　Great changes have taken place since you left.

　　Considerable time has elapsed since we have been here.

　　4) It is +一段時(shí)間+ since從句

　　It is two years since I became a postgraduate student.