__tomorrow,he would be able to see the opening ceremony.A,If

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__tomorrow,he would be able to see the opening ceremony.A,If he comes B,were he to come
为什么A不对?

1)这是虚拟语气的其中一种
表示对将来情况的主观推测
①if+主语+were to do 主句 ①主语+should/would/could/might+do
　②if+主语+did/were ②主语+should/would/could/might+do　
　③if+主语+should+do ③主语+should/would/could/might+do　
If he were to come,he would be able to see the opening ceremony.
这里是符合第一种的
2)而if he were to come,可以表述成were he to come
这是是运用到这点---- 当虚拟条件句的谓语动词含有were,should,had时,if可以省略,这时条件从句要用倒装语序,即把were,should,had等词置于句首,这种多用于书面语.
eg：Should he agree to go there,we would send him there.=If he should agree to go there,we would send him there.
Were she here,she would agree with us.= If she were here,she would agree with us
　Had he learnt about computers,we would have hired him to work here.=If he had learnt about computers,we would have hired him to work here.
所以是选B,如果要选A,通常是主句用一般将来时的,If he comes tomorrow,he will be able to see the opening ceremony.

__tomorrow,he would be able to see the opening ceremony.A,If __tomorrow,he would be able to see the opening ceremony.A:we if you would wait for a few minutes ,he would be glad to see Even if he were here,he would not be able to help us opening speech for a debate : should the government be able The opening ceremony is to be held in the lecture hall this On the opening ceremony,the Olympic flag will be ___jn the a With what color light would you expect to be able to see the I would if it __tomorrow He thought the police would be able to find the ( ){own} We look forward to ( )to the opening ceremony 27.we look forward to ______ to the opening ceremony.