One of the most frequently asked questions about grammar is the choice between the different forms of pronoun that: who, who, who, who, who, who, who, who, whoever. The number (singular or plural) of the pronoun (and associated verbs) is determined by what the pronoun relates to; It can relate to a single person or a group of people: Although pronouns are useful in helping authors avoid repetition, they should be used sparingly to keep the importance of the sentence clear. Look at this sentence: with the singular pronoun, she agrees with Clara. It is not natural for a native speaker to say this: it might be useful to compare the forms of who is with the forms of the pronouns him and them. Their forms are similar: historically, English, the masculine pronoun, used as a norm.