To Verb or Not To Verb

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Across
  1. 2. verb link subject to another words
  2. 5. verb forms simple past tense with ed
  3. 6. verb two or more verbs joined together
  4. 7. verb helps main verb
  5. 8. often most important part of sentence
Down
  1. 1. verb shows action
  2. 3. verb forms past tense by changing vowel
  3. 4. nominative naming word that follows a linking verb and renames subject