1. The Present Perfect Tense.
2. The Present Perfect Tense versus the Simple Present Tense.
3. The Present Perfect Continuous Tense.
4. The Present Perfect Tense vs. the Simple Past Tense.
5. The Present Perfect Tense with Indefinite Past Time.
6. The Present Perfect Continuous Tense with Ongoing Activities.
7. The Present Perfect Tense with No Time Mentioned.
8. The Present Perfect Tense vs. the Present Perfect Continuous Tense with No Time.
9. Passive and Active Voice.
10. The Passive Form with a Performer.
11. Using the Active Voice Only.
12. Participles Used as Adjectives.
13. Participles Used As Adjectives to Show Feelings.
14. The Past Perfect Tense.
15. The Past Perfect Continuous Tense.
16. The Past Perfect (Continuous) Tense or the Present Perfect (Continuous) Tense.
17. The Past Continuous Tense.
18. Comparison of Past Tenses.
19. Modals and Related Expressions.
20. Must Not and Not Have To.
21. Comparing Negative Modals
22. Making Suggestions.
23. Expectations.
24. Possibilities.
25. Logical Conclusions.
26. Modals with Continuous Verbs.
27. Modals in the Past: Have + Past Participle.
28. Past Possibility.
29. Past Necessity: Had To vs. Must Have.
30. Past Mistakes.
31. Be Supposed To in the Past.
32. Past Directions Not Taken.
33. Adjective Clauses.
34. Relative Pronoun as Subject.
35. Relative Pronoun as Object.
36. Relative Pronoun As Object of Preposition.
37. Where and When in Adjective Clauses.
38. Where, That, or Which.
39. Whose + Noun in Adjective Clauses.
40. Adjective Clauses after Indefinite Compound Pronouns.
41. Infinitives.
42. Verb Followed by an Infinitive.
43. Object before an Infinitive.
44. Causative Verbs.
45. Adjective Plus Infinitive.
46. Gerunds.
47. Gerunds after Prepositions and Nouns.
48. Verb Followed by a Gerund or an Infinitive.
49. Gerund or Infinitive after a Verb: Differences in Meaning.
50. Adverbial Clauses.
51. Time.
52. Using the Participle (-ing Form) after Time Words.
53. Reason and Purpose.
54. Contrast.
55. Condition.
56. Sentence Connectors.
57. So ... That and Such ... That.
58. Noun Clauses.
59. Noun Clauses after Verbs and after Adjectives.
60. Noun Clauses to Show Importance.
61. Reported Speech.
62. Say vs. Tell.
63. Reporting an Imperative.
64. Reported Questions.
65. Present Unreal Conditions.
66. Implied Conditions.
67. Real vs. Unreal Conditions.
68. Past Unreal Conditions.
69. Wishes.
70. Wish for Desired Changes.