Question

but do you know what happen all of a sudden in this sentence which is error​

Answer 1

Answer:

What you are saying bro

Answer 2

Answer:

All of a Sudden or All of the Sudden—Which is Correct? All of a sudden is an idiom that is a more poetic way of saying “suddenly.” A common mistake to make, especially for English learners, is to write all the sudden or all of the sudden. On a sudden is a historic but outmoded variant.