Of – de
(Pronounced deh)
To remember that of is pronounced deh (de) in Spanish, use the following mnemonic:
Of all the things he was afraid of, going to the dentist (de) was by far the worst.

Examples of de (of) in a sentence
El color de mi coche es rojo.
(The colour of my car is red.)
La casa de mi abuela es muy grande.
(The house of my grandmother is very big.)
Un vaso de agua, por favor.
(A glass of water, please.)