Meaning and Usage
"昨日" (きのう) means "yesterday" and is used to refer to the day before today. It is a very common word in daily conversation and writing.
Common Contexts
You will often see "昨日" used when talking about events, weather, or activities that happened the previous day. For example, "昨日は雨が降りました" means "It rained yesterday."
Collocations and Patterns
- 昨日の + noun: Refers to something related to yesterday, e.g., 昨日の映画 (yesterday's movie).
- 昨日 + verb in past tense: Describes actions that took place yesterday, e.g., 昨日、友達と話しました (Yesterday, I talked with a friend).
Register and Politeness
"昨日" is neutral and can be used in both casual and formal contexts. It is appropriate for everyday conversation as well as written language.
Common Mistakes
Learners sometimes confuse "昨日" with "一昨日" (おととい, the day before yesterday). Remember that "昨日" always means just one day before today.