The New Testament Greek Lexicon
| Strong's Number: 5712||Tense, Voice and Mood|
The imperfect tense generally represents continual or repeated action. Where the present tense might indicate "they are asking," the imperfect would indicate "they kept on asking."
In the case of the verb "to be," however, the imperfect tense is used as a general past tense and does not carry the connotation of continual or repeated action.
The passive voice represents the subject as being the recipient of the action. E.g., in the sentence, "The boy was hit by the ball," the boy receives the action.
The indicative mood is a simple statement of fact. If an action really occurs or has occurred or will occur, it will be rendered in the indicative mood.
Thayer and Smith. "Greek Lexicon entry for ". "The New Testament Greek Lexicon".