Of — Relation, Composition, and Collocations

Use 'of' for possession and belonging, material composition (made of), quantities (a cup of), and fixed adjective collocations like afraid of, proud of, and consists of.

Of — Relation, Composition, and Collocations

'Of' is the second most frequent word in English after 'the', yet it generates a disproportionate share of preposition errors at B1–B2 level. The main difficulty is not its frequency but its collision with 'from': Russian speakers in particular produce 'consists from', 'made from gold', and 'proud from my son' because Russian uses «из» (≈ from) in these contexts. Cambridge Learner Corpus data shows that 'consists from' is one of the top-20 most frequent individual preposition errors produced by Russian-L1 learners at B1–B2. The 'made of/from' distinction adds a second layer of difficulty.

Of for Fixed Adjective Collocations

Are you afraid of spiders?
She's very proud of her achievements.
He's tired of working late every night.
The bag is full of books.

Consists of — Never 'From'

The team consists of five members.
The course consists of ten modules.

Made of vs Made From

This table is made of wood. (material still visible)
Wine is made from grapes. (material completely transformed)

Of for Quantities

A cup of tea; a piece of cake; a group of students.

Common Mistakes

✗ The team consists from five members. → ✓ The team consists of five members.
✗ I'm very proud for my son. → ✓ I'm very proud of my son.
✗ This ring is made from gold. → ✓ This ring is made of gold.