Have/has studied.
The present perfect tense of the verb "study" is "have studied."
Studied is not a present tense verb. It is the past tense of study (present tense).
"have tried" is the present perfect tense.
"They have" is the subject and auxiliary verb parts of the present perfect tense. Following these should be a past participle of a verb to complete the tense.
Present perfect tense.
The present perfect tense of the verb "study" is "have studied."
The present perfect forms are have studied, has studied.Examples:We have studied the results. (plural subject)He has studied the results. (singular subject)
Studied is not a present tense verb. It is the past tense of study (present tense).
"have tried" is the present perfect tense.
"You have" is present perfect tense.
"They have" is the subject and auxiliary verb parts of the present perfect tense. Following these should be a past participle of a verb to complete the tense.
Present perfect tense.
The present perfect tense of the verb "practice" is "have practiced" or "has practiced."
Present Tense, Paste Tense, Future Tense, Future Perfect Tense, Present Perfect Tense, Past Perfect Tense
I/you/we/they have saved. He/she/it has saved.
The present perfect singular of the verb "to place" is "I have placed".
This is the imperfect tense. (verb)= present tense (verb)ed= perfect tense was (verb)ing= imperfect tense Perfect and imperfect are both forms of the past tense.