Page 99 - Just Enough English Grammar Illustrated Book

Question Markers as Subjects
When a question begins with a question marker that replaces
the subject, regular word order applies, because the question
marker as subject is in the first position.
Who swims? Ben swims.

Question word asking for the subject.
What opens? The pool opens.

When “who” or “what” replaces the subject to form
a question, regular word order applies.

Use regular word order with verb phrases as well. For example:
Who is swimming now? Who will swim next? (Refer to Chapter
3, Pronouns, to review the use of question words as subjects.)

When making negative statements in the present or past tense,
use a form of to do and the word not.

Affirmative Statements Using To Do in Present Tense

My brother We do celebrate
does eat Halloween.
hot dogs. The pool
does open
today.

Negative Statements Using To Do in Present Tense

No, I do not We do not celebrate
eat hot dogs. Halloween October 30th.
The pool
does not
open today.

don’t doesn’t don’t
Negative Statements Using To Do in Past Tense
The pool We did not celebrate
No, I did not did not open Halloween last year.
eat hot dogs last night.
yesterday.

didn’t didn’t didn’t
86