verb
ADVERB
▪ carefully , closely , in detail
▪ extensively
▪ adequately , fully , properly , thoroughly
▪
The allegations have not yet been properly ~d.
▪ actively , vigorously
▪
He claimed the Army had failed to vigorously ~ the case.
▪ empirically , experimentally , rigorously , scientifically
▪ further
VERB + INVESTIGATE
▪ ask sb to , be called in to
▪
Police have been called in to ~ the complaints.
▪ decide to
▪ agree to , pledge to ( esp. BrE ), promise to
▪
The company has promised to ~ claims that its products are unsafe.
▪ aim to , be designed to , seek to
PREPOSITION
▪ for
▪
He is being ~d for illegal business dealings.
Investigate is used with these nouns as the subject: ↑ detective , ↑ enquiry , ↑ journalist , ↑ jury , ↑ officer , ↑ panel , ↑ police , ↑ prosecutor , ↑ research , ↑ researcher , ↑ study
Investigate is used with these nouns as the object: ↑ abuse , ↑ affair , ↑ allegation , ↑ aspect , ↑ case , ↑ cause , ↑ charge , ↑ claim , ↑ complaint , ↑ corruption , ↑ crime , ↑ death , ↑ disappearance , ↑ distribution , ↑ effect , ↑ effectiveness , ↑ extent , ↑ feasibility , ↑ impact , ↑ incidence , ↑ incident , ↑ influence , ↑ irregularity , ↑ link , ↑ matter , ↑ mechanism , ↑ misuse , ↑ murder , ↑ nature , ↑ origin , ↑ phenomenon , ↑ possibility , ↑ problem , ↑ relationship , ↑ report , ↑ role , ↑ scandal , ↑ sighting , ↑ subject , ↑ utility , ↑ validity , ↑ violation , ↑ workings