Note that shimau conjugates as a normal godan verb.
Vte = -te form verb (死ぬ -> 死んで)
Amatuka
Note that the Vte+shimau can be shortened in one of two ways depending on the kana used for the 'te' form verb.
e.g. 死んでしまう → 死んじゃう 凍えてしまう → 凍えちゃう
Amatuka
Not always used in negative nuance.
Amatuka
this is very good
tarun rana
Vて+しまうhas two uses. One is, as indicated, to emphasize the completeness or finality of the verb action. The other is to indicate that the occurrence or action denoted by the verb is unfortunate or undesired, e.g., なくなってしまいました ([he or she] sadly died)