"All of us" doesn't contain a verb.
Consistency in verb tense means that all the verbs are in the same tense.
The present tense of the verb "use" is "uses" for third person singular (he, she, it) and "use" for all other subjects (I, you, we, they).
That would be future tense.
you add " have " for ( I , you , we , you , they ) , and " has " for ( he , she , it ) all this + the past participle of the verb you're using .
"What language did you speak?" is past tense. Did is the past tense of do.
It's the past perfect continuous tense.
The past tense is heard.
It appears to be using the subjunctive mood rather than the present tense (When it is older...). The dog is not currently older, a counterfactual condition. The statement itself is an opinion, not a fact. All these point to the subjunctive mood rather than the present tense.
usedIn simple past tense, you would say, "I used a computer last week."
The present tense of used is:I/You/We/They use.He/She/It uses.The present participle is using.
Do is present tense and future tense. "I will do it." "She will do it." "You will do it." And did is the past tense. "I did it." "He did it." "We all did it."
The imperfect tense of "sum" (to be) in Latin is formed using the base "er-" combined with the imperfect tense endings. The conjugation is as follows: "eram" (I was), "eras" (you were), "erat" (he/she/it was), "eramus" (we were), "eratis" (you all were), and "erant" (they were). This tense indicates a continuous or repeated action in the past.