0 used before a verb to show that it is in the infinitive --
Do we have enough paint to be going on with, or should I get some more while I'm out?
To be honest (= speaking honestly), Becky, I like thegrey shirt better.
To make this cake, you'll need two eggs, 175 grams of sugar, and 175 grams of flour.
Can you tell me how to get there?
I don't know what to do.
He has this enviable ability to ignore everything that's unpleasant in life.
He told me to wait.
I need to eat something first.
Sadly, she didn't live to see her grandchildren.
I'll have to tell him.
1 in the direction of: --
UK You've got your sweater on back to front (= with the back of the sweater on the chest).
I had my back to them, so I couldn't see what they were doing.
We received another invitation to a wedding this morning.
I asked Kirsten and Kai to dinner (= invited them to come and eat dinner with me) next week.
We went to Prague last year.
2 used for showing who receives something or who experiences an action: --
3 until a particular time, state, or level is reached: --
5 in connection with: --
She thinks her house is great, but it's nothing to where I live.
The police are expecting four to five thousand marchers tomorrow.