The interrogative (indicating a state of questioning): "Will you leave me alone now?" One marker of the interrogative is that frequently the speaker inverts the subject-verb order by placing the helping verb first, before the subject: "Will you leave me alone?" instead of "You will leave me alone." Frequently the interrogative appears with requests for a course of action or requests for information.
The conditional (indicating a conditional state that will cause something else to happen): "The bomb might explode if I jiggle that switch." Also, "The bomb could explode if you jiggle that switch." The conditional is marked by the words might, could, and would. Frequently, a phrase in the conditional appears closely linked to a phrase in the subjunctive (see below) preceded by a subordinate conjunction like if.