TO HAVE in the Present Tense plus the main verb in the Past Participle (the 3rd form).
It expresses actions that:
1. began in the past and are still going on today:
I have been studying the piano for 19 months.
2. began and ended in the past, but the respective action still has obvious results/effects in the present:
She has learnt the lesson (and she knows it).
We have told Jerry the truth (and he knows it).
I've seen this film (I don't want to see it once more).
3. took place in the past, but VERY RECENTLY:
I'm so tired, I have just returned from the supermarket.
4. with words like: ALREADY, OFTEN, EVER, LATELY, USUALLY, NEVER, RECENTLY, etc.
5. took place in the past at AN UNSPECIFIED MOMENT:
I've met Susie. He has broken his left foot. Have you read it?
The present perfect tense is formed by using the auxiliary verb "have" (or "has" for third person singular subjects) followed by the past participle of the main verb. For example, "I have finished my homework."
The present perfect tense of "form" is "have formed" (for plural subjects) or "has formed" (for singular subjects). It is formed by using the auxiliary verb "have" or "has" followed by the past participle of the verb "form".
No, "were" is not present perfect. Present perfect is formed by using the past participle along with the auxiliary verb "have" or "has". For example, "have gone", "has eaten".
Present perfect. Present perfect is formed with have / has + past participle. transformed is the past participle of transform
The present perfect tense of "reply" is "have replied" or "has replied." This tense is formed by using the auxiliary verb "have" or "has" followed by the past participle form of the verb, in this case "replied."
The present perfect tense of "want" is "have wanted." This tense is formed with the auxiliary verb "have" followed by the past participle of the main verb, in this case "wanted."
The present perfect tense of "form" is "have formed" (for plural subjects) or "has formed" (for singular subjects). It is formed by using the auxiliary verb "have" or "has" followed by the past participle of the verb "form".
Present perfect. Present perfect is formed with have / has + past participle. transformed is the past participle of transform
The present perfect tense is formed with the auxiliary verb has/have + a past participle.I have bledWe have bledYou have bledHe/she has bledThey have bled
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 past perfect progressive tense is formed with the auxiliary verbs had + been and a present participle. The past perfect progressive tense of dance is had been dancing.
Present perfect tense.
The present perfect tense of "hid" is "have/has hidden."
The present perfect tense is formed with the auxiliary verb have and a past participle. Both dreamt and dreamed are acceptable past participles for dream.I/We/You/They have dreamt/dreamedHe/She/It has dreamt/dreamed
Present perfect is formed with -- have/has + past participle.The past participle of customize is customized, so present perfect is have customized or has customized.
Actually, "have" is the present tense form for first and second person plural (I, you, we, they) while "has" is the present tense form for third person singular (he, she, it). For example: "I have, you have, we have, they have" versus "he has, she has, it has."
present tense past tense future tense present perfect tense past perfect tense future perfect tense present progressive tense past progressive tense future progressive tense present perfect progressive tense past perfect progressive tense future perfect progressive tense
The present perfect tense of "are" is "have been."