Tense
DHC's popular Tense course covers in detail the difficult aspects of choosing the appropriate verb tense to fit a given situation. Lesson 1's highlights include a discussion of Present Time and Future Time, and an explanation of the subtle differences between will and would. Lesson 2 talks about the various ways of expressing Past Time, including the present perfect, past perfect, and past progressive tense forms. The textbook includes many examples and practice sentences.