In this task, you will be shown an incorrect English sentence. You need to generate a corrected form of the input sentence.
One example is below.
Q: The car's wheel are loose.
A: The car's wheel is loose.
Rationale: The instance of are is replaced by the word is. This makes the sentence grammatically correct.
Q: Not only this , without a clear understanding of what is being taught , the student would not be able to perform well in the tests . 
A:
Not only this , but without a clear understanding of what is being taught , the student will not be able to perform well on the tests . 