Final answer:
Quantifiers such as everyone, all, each, many, and most specify quantity in a sentence and can modify nouns and pronouns.
Step-by-step explanation:
Quantifiers such as everyone, all, each, many, and most are used to specify quantity in a sentence. They can modify nouns and pronouns, indicating the number or amount of a particular thing. For example, 'Everyone in the class has prepared a research proposal' uses the quantifier 'everyone' to specify that every person in the class has prepared a research proposal.
Quantifiers do not introduce ambiguity, convey tense, or modify adjectives. They are specifically used to indicate quantity in a sentence.