How to Use "Key" with Example Sentences

key (n): a piece of metal shaped to fit into a lock; one of the buttons or bars on a computer or piano

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Used with adjectives:

"He kept the master key in a safe place."
(master, duplicate, spare)

"She was looking for her apartment key."
(apartment, car, door, house, room)

"We need to replace some of the computer keys."
(computer, typewriter, piano, organ)

Used with verbs:

"She turned the key in the lock."
(turned, inserted, put)

"He forgot to take the key from the door."
(take, remove)

"She used the spare key to get in the house."
(used, found)

"He left a key with his parents."
(left)

"I accidently locked the keys in my car."
(locked)

"You need a key to open the safe."
(open, unlock)

"Press the enter key twice."
(press, hold down, punch, tap, hit)

Used with prepositions:

"You have to lock it with a key."
(with)

"She doesn't have the key for the room."
(for, to)

key (adj): very important

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Used with nouns:

"He has a key advantage with his height."
(advantage)

"She is a key contributor to this project."
(contributor, member)

"We're missing the key ingredient."
(ingredient)

"He is the key suspect in the murder."
(suspect, witness)