Have a look at the following sentences from alternate history:
If the Romans had won the Battle of the Teutoburg Forest, no one would have spoken English.
If Shakespeare had been a renowned historian, the Industrial Revolution would have happened 200 years early.
if Germany had invaded Britain by sea, World War II would have ended earlier
Can you identify what type of sentences they are? What is different from similar types of sentences?
When do you think we use this type of sentences?
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