how can u writ a sentence
A complete sentence need not be complicated. You need to start with a subject; that is what are you writing about, followed usually by a verb and then a finish. An example could be " I went yesterday to the store." A "fragmented," or incomplete sentence might read " Went yesterday to the store." Remember too, that in creative essay and story telling, fragmented sentences my be all right if you are re-telling a story.