A sentence expresses a complete thought. it begins with a capital letter. it ends with a period(.) Or a question mark(?) Or an exclamation point(!) To describe one's drawing, must consider the following:
1.number(one, two)
2.size(small, tall)
3.shapes(around, long)
4.age(old, new)
5.color(red, blue)
6.opinion(pretty, good)
In addition, you must look at the characters and the place because they will lead you in getting the correct idea.