The concessive is muuttainnen, and the conditional is muuttaisisin, etc. The imperative and optative muuttaitkaan, muuttaitkoon[13].
The Formation of Verbs.
Verbs are either primitive, that is to say, they consist of a simple root, to which are added the various modal and personal terminations, or they are derivative, that is to say, besides these terminations some formative syllable is added to the root, such as ta, ele, aise. It is not easy to assign a precise meaning to all of these terminations, particularly to the commoner, which are used in many and not very definite senses.
Simple roots are either transitive or intransitive in their meaning.
Derivative transitive verbs are formed with the following suffixes, which, however, are sometimes also found in verbs of neuter signification.
(1) ta, tä, which must not be confounded with the ta of the first infinitive, is added to verbal roots ending in e, which is rejected.
päästää, to let go, but päästä, intransitive. (N.B. The first verb is for päästätä, the second for pääsetä, so that the t of the latter belongs to the termination of the infinitive, but the t of the latter to the stem). Paksuntaa, to thicken, but paksuta, to grow thick; peljättää, to frighten, but peljätä, to fear; viertää, to roll down, transitive or intransitive, but vierrä only intransitive.
(2) tta, ttä, is added chiefly to roots ending in u or y which are not rejected. Juottaa, to give to drink (juoda, to drink); käyttää, to use (from käydä); menettää, to cause to go or lose (mennä, to go); näyttää, to show (nähdä, to see); tuottaa, to cause to bring, to get (tuoda, to bring); kuolettaa, to kill (kuolla, to die).
(3) utta, yttä, is added mostly to polysyllabic roots: kävelyttää, to make walk; epäilyttää, to make doubt; huomauttaa, to make observed; liikuttaa, to move, trans. (liikkua, intrans.).