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（必修）英语5二年级英语《Theme C Information Age and Our Life Computer Science Unit 5 Magic Internet Grammar》精品课教案
根据所假设的条件能够实现与否，可将条件句分为真实条件句和非真实条件句。
真实条件句所表示的假设是可能发生或实现的，句中的条件从句与结果主句皆用直陈语气，且这种句子主句是一般现在时时，从句用一般现在时表示将来时。
You will be late for class if you don’t hurry.
如果你不赶紧，上课就要迟到了。
I shall come if I want to (come).
如果我想来，我就会来。
非真是条件句也就是我们平常所说的虚拟条件句，所表示的假设往往是一种与事实的相反，是不可能实现的。句中条件从句与主句都用虚拟语气，时态自然也与真实条件句中的时态有所不同。
Studying the rule
Read the little poem below, paying special attention to the colored parts and trying to understand their meanings.
If all the seas were one sea,
What a big sea that would be!
If all the trees were one tree,
What a big tree that would be!
If all the axes were one ax,
What a big ax that would be！
If all the men were one man,
What a big man that would be!
If the big man took the great ax,
And cut down the big tree,
And let it drop into the big sea,
What a splash that would be!
Finding the rule
Read more examples, paying attention to the colored parts, and answer the question below.
More examples:
1) If the Internet disappeared tomorrow, what life would we have?