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Verb tense in citations
- 2. Citation and tense
• Researcher activity as agent : past
simple.
• Jones (1987) investigated the causes of
lung cancer
- 3. Citation and tense
• Researcher activity not as agent :
present perfect.
• The causes of lung cancer have been
widely investigated.
- 4. Citation and tense
• No reference to researcher activity:
present simple.
• The causes of lung cancer are complex.