The following sentence uses which principal part of the verb?
B. Present
The sentence contains a verb in the present tense form: "do".
The sentence written in past form would be: We did our homework at the table. Did is the past form of do.
The sentence written in present participle would be: We have been doing our homework at the table. Adding have been + the verb in ing.
The sentence written in past participle would be: We have done our homework at the table. Adding have + verb in the past participle form.