Identify and correct the error in the following sentence:
Stephen drive as rashly as Rafi.

Hint: When stating a fact, the plural form of a verb needs to be used. It is known as an infinitive; it has an infinite effect and does not fall under a particular tense, which means that it is repetitive or routine in nature.

Complete step by step answer:
The given sentence is a comparative sentence where it is mentioned that Stephen is a rash driver as is Rafi. Both Stephen and Rafi have this habit of being rash drivers, this fact indicates that this is a routine habit of theirs and there is no end to it as such. For sentences like this, the verb becomes non-finite where it gives the repetitive nature their attitude or rash driving. Hence the right form of the sentence is – Stephen drives as rashly as Rafi. Please notice how the verb took the non-finite form.

Note:
It is always important to use the plural form of a verb in a sentence when emphasizing on its continuous nature.