Is the sentence correct - The boy could blew candle?

No, the sentence "The boy could blew candle" is not correct.

Here's why:

* Incorrect Verb Tense: "Blew" is the past tense of "blow". The sentence needs a present tense verb, as it's describing an ability.

* Missing Object: "Blow" needs an object. What is the boy blowing?

Here are some ways to correct the sentence:

* The boy could blow out the candle.

* The boy could blow on the candle.

* The boy was able to blow out the candle.