0 used before a verb to show that it is in the infinitive --
I'll have to tell him.
Sadly, she didn't live to see her grandchildren.
I need to eat something first.
He told me to wait.
He has this enviable ability to ignore everything that's unpleasant in life.
I don't know what to do.
Can you tell me how to get there?
To make this cake, you'll need two eggs, 175 grams of sugar, and 175 grams of flour.
To be honest (= speaking honestly), Becky, I like thegrey shirt better.
Do we have enough paint to be going on with, or should I get some more while I'm out?
1 in the direction of: --
We went to Prague last year.
I asked Kirsten and Kai to dinner (= invited them to come and eat dinner with me) next week.
We received another invitation to a wedding this morning.
I had my back to them, so I couldn't see what they were doing.
UK You've got your sweater on back to front (= with the back of the sweater on the chest).
2 used for showing who receives something or who experiences an action: --
3 until a particular time, state, or level is reached: --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Vi kan slutföra det steg för steg hur lång vägen än är och den kan inte slutföras hur kort vägen än är om du inte ens markerar ditt fotavtryck.