Of — Relation, Composition, and Collocations — English Grammar Exercises
by, with, for, about, of, as, like — use each one precisely
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
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 course consists of ten modules.
Made of vs Made From
Wine is made from grapes. (material completely transformed)
Of for Quantities
Common Mistakes
✗ 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.
Frequently Asked Questions
What is the difference between 'by' and 'with' in English?
'By' describes a method or means — how something is done at an abstract level: 'by bus', 'by email', 'by hand', 'by mistake'. 'With' describes a tool or instrument you physically hold and use: 'with a pen', 'with scissors', 'with a spoon'. The test: if you can hold the object in your hand, use 'with'. If it's an abstract method or means of transport/communication, use 'by'. 'With' also expresses accompaniment ('with my friends') and manner ('with care').
When do you use 'as' and when do you use 'like'?
'As' introduces an actual role or function — the person or thing genuinely is what follows: 'She works as a nurse' (she IS a nurse), 'He used the chair as a table' (the chair functioned as a table). 'Like' introduces a comparison — the person or thing resembles but is not identical to what follows: 'He runs like a professional athlete' (similar, but he's not one). A common error: 'She works like a nurse' implies she is not actually a nurse. Use 'as' for real roles; 'like' for similarities.
Which preposition follows 'responsible', 'famous', and 'interested'?
These are fixed collocations: 'responsible for' (never 'about' or 'of'), 'famous for' (never 'about'), 'interested in' (never 'by' — though the Russian instrumental case suggests 'by'). Other key collocations: 'afraid of', 'proud of', 'tired of', 'good at', 'depends on', 'consists of', 'apologise for', 'thank someone for'. Learning these as complete chunks — adjective + preposition — is more reliable than trying to derive them from rules.
What is the difference between 'made of' and 'made from'?
'Made of' is used when the original material is still visible or identifiable in the final product: 'a table made of wood' (you can see the wood), 'a ring made of gold' (the gold is apparent). 'Made from' is used when the material has been completely transformed and is no longer recognisable: 'wine made from grapes' (no grapes visible), 'paper made from wood pulp'. In practice, 'made of' is the safer default for solid, visible materials.