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let's learn kind.
It's very common to use kind as an adjective.
Kind describes someone who's caring and helpful, and it can also describe the actions that make them that way.
He always helps me.
He's really kind.
That's such a kind gesture.
We also use this word as a noun to say what group something is in.
Tigers are a kind of cat.
Be careful.
We can use kind of to suggest that something is only just that type of thing.
This colour, it's kind of blue, kind of green, somewhere in the middle.
Okay, it's kind of complicated, but we use kind as an adjective for good acts and good people, and we use it as a noun to talk about categories of things.