Step 1: Subject-Verb Agreement:
When the subject is plural, as in "My friend and I," we use the plural form of the verb. The verb "do" is the correct form here because "I" is part of a plural subject ("My friend and I").
Step 2: Analyzing the Options:
- Do: The correct option. Since "My friend and I" is plural, we use "do" (plural verb form) for the subject.
- Does: This is used for singular subjects (e.g., "he," "she"), so it is incorrect here.
- Have: This is used with plural subjects or as an auxiliary verb, but in this case, "do" is preferred for the subject in this context.
- Has done: This is incorrect because "has" is used for singular subjects in the present perfect tense. We need a simple present tense verb here.
Step 3: Conclusion:
The correct answer is do because "My friend and I" is a plural subject.