If all things are considered, I think we must start right away.改成独立主格结构,可不可以是If all things being considered.....If要不要去掉,为什么,,,being要不要去掉,为什么。。详细点,拜托了。。。
还有一题类似的,When the office building is completed, they can work in there. 改成独立主格结构,可不可以是the office building being completed,they can work in there