We could have ------ lunch with them

Had ate
Eat
Ate
Eaten
I choose had ate. Ami I right.

No, sorry.

Here are the principal parts of this verb and how each is to be used correctly:

eat - present tense; add -s for 3rd person singular uses; use with helping verbs for different tenses (could, will, etc.)

ate - simple past tense; use alone for finished past actions; no endings; no helping verbs

eaten - past participle; use alone as an adjective; use with helping verbs for various tenses (have, had, will have, etc.)

okay thank you

according to the rule
eaten is the right option?

Right!

It is always ___ who pays the bill.

he
her
me
us

would it be me?

Her

No, "had ate" is not the correct answer. The correct choice would be "eaten." In this case, the verb "eat" should be in the past participle form to fit the structure of the sentence.

To understand why "eaten" is the correct choice, it is helpful to analyze the sentence structure. The bare infinitive form of the verb "eat" is "eat," the simple past tense is "ate," and the past participle is "eaten."

In the sentence, the word "have" suggests that the verb should be in the past participle form. So, we need to use "eaten" to form the present perfect tense: "We could have eaten lunch with them."

Overall, it is important to note that "had ate" is not grammatically correct and should be replaced with "eaten."