洗衣服

You can use it as a simple verb-object phrase. If you want to say you are currently doing it, add 在 before it. For example, 我在洗衣服 means 'I am doing laundry.' If you want to specify how you are washing, you can add words in front. But usually, just these three characters do the trick. It is a very 'active' phrase.

Use this in your daily life constantly. Tell your roommate why you can't go out. Tell your mom what you did all morning. Use it when you are at a laundromat. It is perfect for texting friends when you are busy with chores. It is a very safe, everyday expression.

Don't use this if you are talking about dry cleaning. For that, you should use 干洗. Also, don't use it for washing other things like dishes or your face. 洗 is the universal verb for 'wash,' but the object must be clothes. If you are at a very fancy gala, maybe don't discuss your laundry habits. It is a bit too domestic for high-stakes formal events.

In China, many people still prefer air-drying clothes over using dryers. You will see racks of 衣服 hanging on balconies everywhere. It is a sign of a hardworking household. Historically, washing clothes was a social activity by the river. Today, it is mostly done by machines, but the phrase remains unchanged. There is a certain 'homely' feel to this expression.

You might hear people just say 洗衣. This is more common on signs or detergent bottles. You might also hear 洗完了, which means 'finished washing.' If you are using a machine, you can say 用洗衣机洗. But in 99% of conversations, 洗衣服 is exactly what you need. It is simple, clear, and very useful.