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Present tense irregular verbs - stem vowel changin
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Person-number Substitution Group A
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Group B
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Group C
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Group D
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Group E
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Group F
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Group G
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Tense Substitution Group A
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Group B
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Q&A Group A
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Group B
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Translation Drill A
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Group B
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Replacement Drill A
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Drill B
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Drill C
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Drill D
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Drill E
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Drill F
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Variation Drill A
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Drill B
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Drill C
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Drill D
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Drill E
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Drill F
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Review Drill
