Question

he is very slow .he cannot win the race. synthesis in simple form
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Answer 1

Compound sentence : He is very slow. He cannot win the race.

Simple sentence : He is very slow so he cannot win the race.

We can change any sentence into a simple sentence by the usage of some coordinating conjunctions like:

1. and,
2. however,
3. so,
4. but,
5. or else, etc.