Have/has lost.
The present perfect tense of "lose" is "have lost."
The present perfect of "lose" is "have lost." For example, "I have lost my keys."
Have/has lost is the present perfect tense of lose.I have lostWe have lostYou have lostHe/she has lostThey have lost
"Have studied" is in the present perfect tense. It is formed by using the auxiliary verb "have" followed by the past participle of the main verb.
There are two forms of the present perfect tense: simple present perfect (I have eaten) and progressive present perfect (I have been eating). Both forms use "have" or "has" with the past participle of the main verb to indicate an action that started in the past and has relevance to the present.
The present perfect tense of "hid" is "have/has hidden."
The simple past and past participle forms are both lost.I lose things easily. (simple present)I have lost my book. (present perfect)I lost my shoe. (simple past)
have/has planned (PRESENT PERFECT)
The present perfect tense of "are" is "have been."
Has/have drawn is the present perfect of "draw".
The present perfect of "follow" is "have followed" or "has followed."
The present perfect is 'I have sung'