An English sentence must have at least one primary-form verb. Each main clause can only have one primary-form verb.
ʌ n WORD_BOUNDARY ɪ ŋ ɡ l ɪ ʃ WORD_BOUNDARY s ɛ n t ə n s WORD_BOUNDARY m ʌ s t ʌ v WORD_BOUNDARY æ t WORD_BOUNDARY l iː s t WORD_BOUNDARY w ʌ n WORD_BOUNDARY p ɹ aɪ m ə ɹ ɹ i f ɔ ɹ m WORD_BOUNDARY v ɜː b WORD_BOUNDARY iː t̠ʃ WORD_BOUNDARY m eɪ n WORD_BOUNDARY k l ɔ z WORD_BOUNDARY k æ n WORD_BOUNDARY oʊ n l i WORD_BOUNDARY h æ v WORD_BOUNDARY w ʌ n WORD_BOUNDARY p ɹ aɪ m ə ɹ ɹ i f ɔ ɹ m WORD_BOUNDARY v ɜː b WORD_BOUNDARY