切符をなくしてしまったようだ。

ticket

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to lose something; to get rid of; to lose someone (wife, child, etc.)

appearing ...; looking ...; way to ...; method of ...ing; form; style; design; like; similar to; thing (thought or spoken)

be; is; indicates past or completed action; indicates light imperative