26. A compound subject with or or nor takes a verb in the singular number if the substantives are singular ([p. 100]).
27. Nouns that are plural in form but singular in sense commonly take a verb in the singular number ([p. 101]).
28. Collective nouns take sometimes a singular and sometimes a plural verb.
When the persons or things denoted are thought of as individuals, the plural should be used. When the collection is regarded as a unit, the singular should be used ([p. 101]).
29. A verb is in the active voice when it represents the subject as the doer of an act ([p. 107]).
30. A verb is in the passive voice when it represents the subject as the receiver or the product of an action ([p. 107]).
The object of the active verb becomes the subject of the passive, and the subject of the active verb becomes in the passive an adverbial phrase modifying the predicate verb ([p. 110]).
31. When a verb takes both a direct and an indirect object, one of the two is often retained after the passive, the other becoming the subject ([p. 112]).
32. The indicative is the mood of simple assertion or interrogation, but it is used in other constructions also ([p. 115]).
33. The imperative is the mood of command or request ([p. 115]).