Used We

When is "some" used as plural and when is it used as singular?

What is the negative form of "I used to be"? I often hear "I didn't used to be" but that sounds awfully wrong in my ears.

What's the negation of "I used to be"? Surely not "I didn't used to be"?

I am trying to find out if this question is correct. Did Wang Bo used to be awkward? Should I write "use to be" instead of "used to be," or is "used to be" correct in this sentence?

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If "used to" is a set idiomatic phrase (i.e. not a tense), then why would it change its form from "use to" to "used to" for the sentence as it does in the positive?

Used to indicate the maiden name of a married woman. (2) Formerly known as. From definition (2) of the both of the above, I found the word, ‘née’ can be used both for person and other than person.

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word usage - Can "née" be used for entities other than people ...

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These make up the vast majority of hits for 'can help doing something' in the Corpus of Contemporary American English. In the sentence given though, help is quite definitely a verb, and used in an affirmative context, so it would be best to have either a plain infinitival or to -infinitival following it.

However, the next occurrence (from Ohio/Missouri in 1917) used the hyphenated form, teen-agers, and for the entire period, teen-ager [s] (12) and teen agers (11) appeared in almost exactly the same number of articles. The spelling teenagers also appeared during this early period, although only twice.