This can help in predicting the upcoming word. This helps the reader use the meaning of the surrounding words. In reading, it's the sound that counts. Then ask the child to give some examples. Teach lower case letters first.
Capital letters account for only five percent of all letters in written English.
Therefore, pay more attention to teaching the lower case letters. One should not worry about the grammar in early stages. Preschoolers, kindergartners and first graders are very concrete in the way they think and cannot handle complicated concepts. Teach the child writing along with reading. Children learn to read faster if they learn to write at the same time.