完成時(shí)態(tài)是瞬間動(dòng)詞要變成延續(xù)性動(dòng)詞
注意事項(xiàng)：這個(gè)時(shí)態(tài)的關(guān)鍵詞是：since,for,so far等
一般 since有① since+一段時(shí)間+ago 例：since two weeks ago
② since+時(shí)間點(diǎn) 例：since Children's day
for 有 for+一段時(shí)間
so far 放在句首 ,譯為“到目前為止”
現(xiàn)在完成時(shí) 瞬間動(dòng)詞改延續(xù)動(dòng)詞
例① die-be dead
The old man has been dead for two days.
這個(gè)老人去世兩天了.
例② borrow-keep
I have keep the book since one day ago.
我在一天前借了這本書.
常見的瞬間動(dòng)詞變延續(xù)性動(dòng)詞形式：
come-be herebegin／start-be onborrow-keep buy-have
die-be deadend／finish-be overgo(get)out-be out
get up-be up fall asleep-be asleepleave-be away from
join-be in／be a member ofput on-wearcatch a cold-have a cold等
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