74. Can
75. Can - Negative
76. Can - Question
77. Must
78. Must - Negative
79. Must - Question
80. Have To
81. Don't Have To
82. Do You Have To
83. Should
84. Shouldn't
85. Should - Question
86. Could
87. Couldn't
88. Could - Question
89. May, Might
90. May Not, Might Not
91. May, Might - Question
Modal Verbs Big Test