verb
BAD : The next morning, the snowman was disappeared.
GOOD : The next morning, the snowman had disappeared.
BAD : One day these problems will be disappeared.
GOOD : One day these problems will disappear.
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Disappeared (from the verb disappear ) is not used like an adjective: 'His wife has disappeared with the children.' 'Suddenly, the pain in my back just disappeared.'
Compare: 'The next morning, the snowman was gone.' Unlike disappeared, gone (from the verb go ) may be used like an adjective.