The present perfect tense of the verb ‘study’ is ‘has studied’ for singular subjects and ‘have studied’ for plural subjects.
To elaborate, the present perfect tense is used to describe actions that occurred at an unspecified time before now or actions that started in the past and continue to the present. For example:
- He has studied for his exams (singular subject).
- They have studied the material thoroughly (plural subject).
In both cases, the action of studying is relevant to the present, whether it’s about preparation for exams or ongoing work with the material.