①person: the speaker or writer's relationship to the subject, e.g. am, are, is are for first, second and third person respectively.
②number: whether it is singular or plural.
③tense: past, present or future, and within each of these, whether the verb is simple or perfect.
④voice: whether the subject is active or passive.
⑤mood: whether the sentence is indicative (simple statement of fact), subjunctive(if it depends on conditions or something else to act) or imperative (a command).

本题考查英语中动词的特征， 可以从动词的人称、 数， 时态， 语态，语气等角度进行分析。 考生从以上5点答案中挑选四点进行答题即可。