1.The existence of oil wells has been known for a long time.
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1.The existence of oil wells has been known for a long time.为什么用has 而不用have
因为主语是 existence,是个抽象名词,所以谓语动词用 单三 has
1.The existence of oil wells has been known for a long time.
1. The existence of oil wells“ has” been known for a long ti
for a long time he has been __ the causes of sleep
英语翻译1.When A troops blew up hundreds of B oil wells at the e
( )Peter has been a secretary for a long time ,
there has been a picture on the wall for a long time.
It ___that he has been ill for a long time
He has been looking_____her pen for a long time
He has been __(wake) for a long time
Lao Lin has been working in the countryside for a long time,
there has been a picture on the wall for long time.
this hat has been in the window for a long time