잠그다 + 아/어요 => 잠가요
잠가 or 잠갔다 is correct
Some Korean people say 잠궈, 잠궜다
잠궈, 잠궜다 is not correct.
It is from 잠구다.
잠구다 is a dialect of 잠그다
잠구다 + 아/어요 => 잠궈요
January 4, 2015
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