Missing a pronoun or relative pronoun; unclear pronoun reference or wrong use of a pronoun. Missing relative pronoun The relative pronouns (e.g. “who”, “which”, “that”, “whom”) cannot be omitted when they are the subject of the relative clause. It is okay to omit the relative pronoun when


Choosing the right verb tense depends on the perspective the writer adopts in connection with time. Usually, current events are narrated in the present tense (e.g. “I am at the office right now.”). Past events are narrated in the past tense (e.g. “I


Agreement errors include problems with subject-verb agreement, modals followed by a main verb and determiners. The subject and the verb in the same sentence should agree in person and number. Modals should be followed by a bare infinitive. In a noun phrase, the determiner should agree with the