Fix the mistake: Present Perfect

The Present Perfect ① Completion — Already Done

The present perfect expresses a state in which something that began at a point in the past affects the present. Since this idea does not exist in Japanese in the same way, understand its three uses (completion, experience, and continuation) separately.

Basic Rule

The form of the present perfect is have / has + past participle. Use has when the subject is third-person singular and have with all other subjects.
The completion use means “have already done something” or “have just done something.” Common adverbs are just（just）/ already（already）/ yet（still / already）.
- just / already are used in affirmative sentences before the past participle (I have just finished. / I have already eaten.).
- yet is used in negative and interrogative sentences at the end of the sentence (I haven't finished yet. / Have you finished yet?).

Points to Note

① Difference from the past tense: the past tense “I finished my homework.（I finished it at some point in the past）” does not refer to the present. The present perfect “I have finished my homework.（I am free now because I finished it）” focuses on the present state.
② The present perfect cannot be used with a specific point in the past (yesterday, last week, two days ago, etc.). “× I have finished it yesterday.” → “○ I finished it yesterday.” or “○ I have just finished it.”
③ Irregular past participles: go → gone (different from the past tense went), do → done, see → seen, eat → eaten, take → taken, write → written, read → read (pronounced “red”), find → found, buy → bought.
④ Difference between been and gone: have been to means “have gone to 〜 before” (experience; the person has returned), while have gone to means “have gone to 〜” (the person is not here now). “She has gone to America.（She has gone to America）” shows that she is away now.

Practice

1. Write “I have just finished my homework” in English.
2. Write “She has not eaten breakfast yet” in English.
3. Correct the error: I have finished my homework yesterday.