The correct way to complete this sentence is: "I have visited three natural history museums so far." Grammar Explanation The verb should be in the Present Perfect tense ( ).
- The Trigger: The phrase "so far" is a classic indicator of the Present Perfect. It implies that the action started in the past and continues up to the present moment, with the possibility of more visits in the future.
- The Structure: Since the subject is "I", we use the auxiliary verb "have". The past participle of the regular verb "visit" is "visited".
Comparison with Past Simple It is important not to use the Past Simple ("I visited") in this specific context because of the timeframe:
| Tense | Example | Usage |
|---|---|---|
| Present Perfect | I have visited three museums so far. | Unfinished time; focuses on the experience/result up to now. |
| Past Simple | I visited three museums last year. | Finished time; focuses on a specific point in the past. |
Summary The sentence indicates a cumulative experience in an unfinished period of time. Therefore, "have visited" is the only grammatically correct choice. Would you like me to provide a few more practice sentences using "so far" to reinforce this rule?
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