So and Such

so + adjective; such + (a) + noun.

Examples

• It was so cold.
• It was such a cold day.

Key rules

• So + adjective or adverb (so cold, so quickly)
• Such + (a/an) + adjective + noun (such a cold day)
• Such + plural noun with no article (such nice people)
• Both can be followed by that for result (so tired that I slept)

Common mistakes

• It was such cold → It was so cold
• It was so a cold day → It was such a cold day