How do you teach your kid how to write English compositions?

For pri levels, can teach them idioms, descriptive words n phrases. Expose them to life as much as possible. It is easier to write about things when they have experiences

Practice with them, through speaking helps too. Speak in proper sentences in your daily life. It would help when they need to write.

Reading newspaper or news headlines helps in pharsing the sentences, Secondly reading. Listening to news also helps