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Section A.2 Verb Phrases: Tense, Aspect, Voice, and Modality

This section follows the chef cooks dinner through every configuration of the English auxiliary system. Each diagram adds or changes one element, building from a simple verb to the full auxiliary stack.
Syntax tree showing simple present tense with no auxiliary verb
Figure A.2.1. Simple Present (No Auxiliary): The chef cooks dinner
Syntax tree showing simple past tense with no auxiliary verb
Figure A.2.2. Simple Past: The chef cooked dinner
Syntax tree showing progressive aspect with auxiliary "is" and present participle "cooking"
Figure A.2.3. Progressive Aspect (BE + -ing): The chef is cooking dinner
Syntax tree showing past progressive with auxiliary "was" and present participle "cooking"
Figure A.2.4. Past Progressive: The chef was cooking dinner
Syntax tree showing perfect aspect with auxiliary "has" and past participle "cooked"
Figure A.2.5. Perfect Aspect (HAVE + past participle): The chef has cooked dinner
Syntax tree showing past perfect with auxiliary "had" and a subordinate clause
Figure A.2.6. Past Perfect: The chef had cooked dinner before the guests arrived
Syntax tree showing perfect progressive with auxiliaries "has" and "been"
Figure A.2.7. Perfect Progressive: The chef has been cooking dinner
Syntax tree showing past perfect progressive with auxiliaries "had" and "been"
Figure A.2.8. Past Perfect Progressive: The chef had been cooking dinner
Syntax tree showing passive voice with auxiliary "was" and agent by-phrase
Figure A.2.9. Passive Voice: Dinner was cooked by the chef
Syntax tree showing agentless passive with auxiliary "was"
Figure A.2.10. Passive without Agent: Dinner was cooked
Syntax tree showing progressive passive with auxiliaries "is" and "being"
Figure A.2.11. Progressive Passive: Dinner is being cooked by the chef
Syntax tree showing get-passive with "got" as passive auxiliary
Figure A.2.12. Get-Passive: Dinner got burned
Syntax tree showing modal "can" expressing ability
Figure A.2.13. Modal — Ability: The chef can cook dinner
Syntax tree showing modal "must" expressing obligation
Figure A.2.14. Modal — Obligation: The chef must cook dinner
Syntax tree showing modal "must" with epistemic meaning and progressive aspect
Figure A.2.15. Modal — Epistemic: The chef must be cooking dinner
Syntax tree showing modal "should" combined with perfect auxiliary "have"
Figure A.2.16. Modal + Perfect: The chef should have cooked dinner
Syntax tree showing modal with perfect progressive auxiliaries
Figure A.2.17. Modal + Perfect Progressive: The chef should have been cooking dinner
Syntax tree showing all auxiliary slots filled: modal, perfect, progressive, and passive
Figure A.2.18. Full Auxiliary Stack: Dinner should have been being cooked
Syntax tree showing DO-support auxiliary inverted for question formation
Figure A.2.19. DO-Support in Questions: Does the chef cook dinner?
Syntax tree showing DO-support with negation "not"
Figure A.2.20. DO-Support in Negation: The chef does not cook dinner