完成时态是瞬间动词要变成延续性动词
注意事项：这个时态的关键词是：since,for,so far等
一般 since有① since+一段时间+ago 例：since two weeks ago
② since+时间点 例：since Children's day
for 有 for+一段时间
so far 放在句首 ,译为“到目前为止”
现在完成时 瞬间动词改延续动词
例① die-be dead
The old man has been dead for two days.
这个老人去世两天了.
例② borrow-keep
I have keep the book since one day ago.
我在一天前借了这本书.
常见的瞬间动词变延续性动词形式：
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
希望楼主采纳 因为这是纯手工制作 无抄袭