30. When should you use _a_?
31. When should you use _an_?
32. What is a verb?
33. Of what three parts does a simple sentence consist?
34. Name them and describe each.
35. What is the relation of the verb to the subject with regard to person and number?
36. What is voice?
37. How many voices are there, what is each called, and what does it indicate?
38. What is tense?
39. How many tenses are there, and what are they called?
40. What is the rule for tense in subordinate clauses?
41. What is the reason for the rule, and how can accuracy be determined?
42. What happens when the statement in the subordinate clause is of universal application?
43. What is mood?
44. How many moods are there, and what are they called?
45. How is the indicative mood used?
46. How is the subjunctive mood used?
47. How is the imperative mood used?
48. What is the potential mood?
49. What is the exact meaning of (a) _may_, (b) _can_, (c) _must_, (d) _ought_?
50. What is tense?
51. How are _shall_ and _will_ used in direct discourse (a) in simple statements, (b) in questions, (c) in other cases?
52. How are _shall_ and _will_ used in indirect discourse?
53. What are the exceptions in the use of _shall_ and _will_?
54. What is the general use of _should_ and _would_?
55. How are should and would used in subordinate clauses, in indirect discourse?
56. What exceptions are there in the use of _should_ and _would_?
57. Why do we make mistakes in the use of compound tenses?
58. What is the case of the object in participial construction?
59. What should be avoided in the use of prepositions?
60. Do pa.s.sive verbs ever have objects?
61. What is a p.r.o.noun?
62. What common error occurs in the use of plural possessive p.r.o.nouns?
63. What common error occurs in the use of cases in subordinate clauses?
64. What danger is there in the use of p.r.o.nouns, and how can it be avoided?
65. What is an adverb?
66. What is the important distinction in the use of adverbs and adjectives?
67. What rule is to be observed in the use of negatives?
68. What is a preposition?
69. Where is it placed in the sentence?
70. What is a conjunction?
71. What is said of _and_ and _but_?
72. How should we pair _either_, _neither_, _or_, and _nor_?
73. What is the rule about placing correlatives?
74. What is an interjection?
75. Does it make much difference where words are put in a sentence? Why?
76. What is the general rule for placing words?
77. When may words be omitted?
78. What is the danger in such omission?
79. Mention some objectionable abbreviations of this sort.