Use "do" when the subject is I, you, we, they, or any plural.
Also use "do" following "to" or an auxiliary verb.
Otherwise use "does."
I do everything.
You do everything.
We do everything.
They do everything.
Parents do everything.
Mary and George do everything.
He does everything.
She does everything.
It does everything.
Mary does everything.
George does everything.
There is nothing to do.
I know what he would do. ("Would" is an auxiliary verb.)
What would he do? ("Would" and "do" go together.)
He can do it.
He should do it.
He must do it.
Yes, if the ellipsis falls at the end of a sentence, you should use a period after it to indicate the end of the sentence.
No, there should not be two periods when "am" is at the end of a sentence. Only one period is needed to end the sentence.
No, however, you should only use the word "homosexual" as an adjective, and even then, you should only use it for same-sex activity among animals. For Humans, you should use the word "gay" (also not capitalized).
You should use a comma before the conjunction in a compound sentence. For example, "I like apples, and she likes oranges."
You use had in a sentence as the past tense of have:When I was a kid I had chicken pox and mumps.
To be clear, one's answer should be grammatically correct.
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You should use the word "that" when you are pointing out or indicating some one person, thing, or idea.
hey john look should we talk this path or that one
you should buy this car rather than that one.
You can use the sentence: She spoke to him reprovingly
"I have a sentence for you."
You should use the word "I" when it is the subject of a sentence, and the word "me" when it is the object of a sentence or of a preposition. "I want you to understand me." "I want you to listen to me."
If it is in the past.
As soon as he does that you should do this.
use "that" when the meaning of the sentence changes. Sometimes "that" can be left out of the sentence. Never use a comma with "that". Use "which" when the meaning of the sentence does not change. Always use a comma with "which".
One example: "In our last football game, many of our passes were intercepted."