The verb tener (full conjugation) is used:

• to express age

Tengo veintidos años.
I am 22 years old.

• to indicate possession

Tengo una casa en California.
I have a house in California.

• to indicate obligations

Tengo que estudiar mucho.
I have to study a lot.

• to express sensations

Tengo calor
I am hot.

• to express a desire to do something

Tengo ganas de dormir.
I feel like sleeping.

• to substitute haber (auxiliary)

Tengo recibido su catálogo.
I have received your catalog.

• in idiomatic expressions

tener cuidado
to be careful

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