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Used with adjectives:
"
The police are carefully investigating the accident."
(carefully, closely, extensively, fully, properly, thoroughly, actively, vigorously, rigorously)
"
Researchers are experimentally investigating the new bacteria."
(experimentally, scientifically)
Used with verbs:
"
A detective has been called in to investigate the case."
(called in to, asked to)
"
He decided to investigate the situation by himself."
(decided to, wanted to, demanded to)
"
The company has promised to investigate the complaints."
(promised to, agreed to, pledged to)
Used with prepositions:
"
He is being investigated for a crime."
(for)
Used with nouns:
"
The detective is investigating the motive for murder."
(detective, journalist, officer, prosecutor)
"
The police have been called in to investigate the abuse."
(abuse, case, charge, claim, complaint, crime, death, disappearance, incident, murder, problem, violation)
"
We are investigating the effects of the new drug."
(effects, effectiveness, extent, misuse, nature, workings)
