1. Expressing motion or direction toward a point, person, place, or thing.
e.g: She came to my school.
2. Expressing limit of movement or extension.
e.g: He grew to six feet.
3. Expressing a point of limit in time.
e.g: It is twenty minutes to six.
4. Expressing limit in degree, condition, or amount.
e.g: Tomorrow's high will be 75 to 80°.
5. Expressing comparison or opposition.
e.g: The score is eight to seven.
6. Marking the infinitive of a verb. (COMMON)
e.g: I really wanted to go.
There are lots of functions done with this preposition anyway. You may browse to gain more accurate information, in case my answer doesn't satisfy you :)
"To" is a preposition.
It can be used for:
1. Expressing motion or direction toward a point, person, place, or thing.
e.g: She came to my school.
2. Expressing limit of movement or extension.
e.g: He grew to six feet.
3. Expressing a point of limit in time.
e.g: It is twenty minutes to six.
4. Expressing limit in degree, condition, or amount.
e.g: Tomorrow's high will be 75 to 80°.
5. Expressing comparison or opposition.
e.g: The score is eight to seven.
6. Marking the infinitive of a verb. (COMMON)
e.g: I really wanted to go.
There are lots of functions done with this preposition anyway. You may browse to gain more accurate information, in case my answer doesn't satisfy you :)