If it was not an accident,he must have done it .
It`s not a matter of if you`ll have an accident,it`s a matte
he must have done it yesteraday,――?he must have done it for
Had it not been by an accident
He must have had an accident,or he _A_ then.
He must have an accident,or he ( ) here then.
If it was thought carefully,it will have been done better.为什
if it had not been for your help ,i couldn't have done it.
1.He must have had an accident ,or ___ then.
He must have had an accident,or he____________ here then
if he knew this ,it would have had to be by accident句子成分
if he ( )me about it ,I would not have knownit
一般说It is an accident 还是It was an accident?