Question

he has studied for two hours, is there any error as per tense chart. please answer

Answer 1

As per tenses, since it is in the past tense, use had instead of has.

Answer 2

$\huge \bold {Hello! Mate}$

There is a remarkable error in the sentence according to the tense rules. In this sentence, the work has begun in the past and is still continuing in the present. In such cases, you will have to use 'present perfect continuous ' tense. Hence, the correct answer will be :-

$<b ><i >$ He has been studying for two hours.

The structure is :- Subject + has/have + been + verb-ing.

Hope you find it useful!