a

preposition To

verb Any of the present or present continuous forms of the irregular verb 'be'. E.g. 'are', 'is', 'am'.

conjunction Of; Indicates inclusion in a number, group, or category

conjunction Modifier prefix used to convert a verb into continuous (i.e an -ing) form. For example, to turn "walk" into "walking" or "eat" into "eating".

To. used to indicated motion, direction, or progress toward a point, place, or thing.

Of. Indicates object relation to a thing or action or activity.