The simple present tense is:
The present tense of begun is begin.
The present tense is begin. The simple past tense is began.
The phrase "is was begun" is not grammatically correct. It appears to be a mix of present and past tense forms. The correct forms would be either "is begun" for present tense or "was begun" for past tense, depending on the intended meaning.
No, the past tense of begin is began. Has begun is present perfect.
Begin is the present tense. Began is the past tense. Will begin is the future tense. Have, has or would have begun are the perfect tense. Had begun is the pluperfect tense. Will have begun is the future perfect tense.
have/has + begun
No, "begun" is not a present tense verb. It is the past participle form of the verb "begin" and is used to create past perfect or present perfect tense. The present tense of "begin" is "begins" (third person singular) or "begin" (first/second person singular and all plural forms).
Begin is used in present tense sentences, and begun is used in past tense sentences. For example: "I will begin the project." "It has already begun."
Begin IS the present tense, began is the past tense, and begun is the past participle.
The correct way to say it is "summer has begun." This is the present perfect tense so it requires an auxiliary verb like "have" and the past perfect conjugation of "begin" which is "begun." "Began" is the past tense of "begin," which is used by itself in a sentence.
The past tense of begun and begin is began.
You should never use "will be begun". Future tense: It will begin... present tense: It has begun... (implying that it isn't over yet) past tense: It began... (implying that it is already over) The implications are not always regarded as being 100%. You may hear someone describe something that has already ended as having begun. It depends on the sentence construction.