A good summary must be complete in itself. It must contain all the important information in the passage so that a reader, who doesn’t have time to read the original passage, will have no difficulty in understanding what the passage is about.
The summary should be brief, clear and precise. That said, it should not be a number of disjointed simple sentences. You can use linking expressions to connect the ideas.
Give ideas, facts or points in the order in which they are given in the original passage.
If the original passage contains sentences in direct speech, it must be changed into indirect speech in the summary.
The summary must be written in the writer’s own words. As far as possible avoid using the same words that appear in the original passage.
A summary must not contain anything that is not in the original.