So + adjective / adverb
Use so before an adjective or adverb to intensify it — similar to "very" but stronger, often followed by a that clause showing a result.
so + adjective / adverb
The music was so loud that I couldn't hear her.
She runs so fast that nobody can keep up.
It was so cold outside that we stayed indoors all day.
He spoke so quietly that I missed every word.
The test was so difficult that half the class failed.
Such + (adjective +) noun
Use such before a noun (with or without an adjective). With singular countable nouns, add a/an.
such + a/an + adjective + singular noun
such + adjective + plural / uncountable noun
It was such a beautiful day that we had a picnic.
They're such kind people — always ready to help.
She has such talent that everyone notices her immediately.
He told such a funny story that we couldn't stop laughing.
They made such a loud noise that the neighbors complained.
Too + adjective / adverb
Use too to mean "more than needed or wanted" — it always expresses a negative or problematic idea. It often appears with an infinitive.
too + adjective / adverb (+ to + infinitive)
The soup is too hot to eat right now.
He drove too fast and missed the turning.
It's too cold to go swimming today.
She was too tired to finish the film.
The price was too high for us to afford.
Adjective / adverb + enough
Use enough after an adjective or adverb to mean "the right amount" (positive) or "not the right amount" (negative). It often appears with an infinitive.
adjective / adverb + enough (+ to + infinitive)
She's old enough to travel alone.
The room isn't big enough for everyone.
He didn't study hard enough to pass.
Is the ladder long enough to reach the roof?
She wasn't experienced enough to get the job.
⚠ Common mistakes:
✗ It was so a beautiful day. → ✓ It was such a beautiful day. (noun needs such, not so)
✗ She is enough tall to reach it. → ✓ She is tall enough. (enough comes after the adjective)
✗ The water is too much hot. → ✓ The water is too hot. (too + adjective, no "much")
✗ He spoke such quietly. → ✓ He spoke so quietly. (so + adverb, not such)