Answer:
1. Start by writing down one of your main ideas, in sentence form.
2. Next, write down each of your supporting points for that main idea. Write down some elaboration for each point that you make.
If you wish, include a summary sentence for each paragraph.
This is not generally needed, however, and such sentences have a tendency to sound stilted, so be cautious about using them.
Once you have fleshed out each of your body paragraphs, one for each main point, you are ready to continue.
Hope this helps!