word完整版本2017年人教版本初中八年级下现在完成时讲及练.docx

人教版八年级下册现在完成时

Unit8 ： 在完成 可以用来表示 生在 去某一 刻的 , 持 到 在的 作（用行 表示）或状 （ be 表示）常与 for （ + 段） ,since （ + 点或 去 的句子） 用 .

① for+ 段 Mary has been ill for three days.

② since+ 去一个 点（ ：自从 ?? 以来） I have lived here since 1998.

③ since+ 段 +ago I have lived here since six years ago.

since+ 从句（ 去 ） I have lived here since I was born.

⑤ It is+ 段 +since+ 从句（ 去 ） It ’s six years since I lived here.

瞬 （ buy,die,join,come ， go ,leave,join ?? ）不能直接与 for since 用。要改

buyhave; borrow keep; come/arrive/reach/get tobe in

go outbe out ; leave be away ; beginbe on ; finishbe over ;

openbe open ; close be closed ; diebe dead

1.have 代替 buy

My brother has had( 不能用 has bought) this bike for almost four years.

2 、用 keep 或 have 代替 borrow

I have kept( 不能用 have borrowed) the book for quite a few days.

3 、用 be 替代 become