Present Continuous: Complete Guide with Exercises

Complete Guide to the Present Continuous Tense with exercises   CHAPTER 3. The present continuous
    1. Uses of the present continuous
    2. Formation of the present continuous
    3. Spelling rules for the formation of the present participle
         a. Verbs ending in a silent e
         b. Verbs ending in ie
         c. One-syllable verbs ending in a single consonant preceded by a single vowel
         d. Verbs of more than one syllable which end in a single consonant preceded by a single vowel
    4. Questions and negative statements
         a. Questions
         b. Negative statements
         c. Negative questions
         d. Tag questions
    5. Comparison of the uses of the simple present and present continuous
    Exercises