For an extensive description go to my page The Verb Structure Circle.

This post is intended as the first in a series on the Basic Principles of English. My focus in the beginning will be on verb structures. I will provide examples and exercises (which is why you will also find these posts under the category Lessons and lesson activities). Each post will focus on one point. Sometimes the exercise will consist of only one small task so that the topic need not take up a whole session.