Comparative adjectives
We use more + adjective with two syllables or more to form the comparative.
We don’t use more with adjectives with one syllable or with adjectives that are already in the comparative form (e.g. smaller, colder, friendlier).
[latex]\color{limegreen}{\checkmark}[/latex] His room is smaller than mine.
✗ His room is more small than mine.
✗ His room is more smaller than mine.
Choose the correct sentence in each pair.