When we wish to express an idea or a thought, we use words grouped together in a certain order so that we convey a definite and sensible meaning. This combination of words is termed a sentence.

In conversation or writing, sentences should always be used in order that the hearer or reader may clearly understand the meaning. When you put words from the nine parts of speech in the right order, you get sentences.

For a start, keep to short sentences. Long sentences tend to have more mistakes in them. As you get better at the language, you can advance to longer sentences punctuated by commas, colons and semi-colons.