asked 165k views
1 vote
What is the present perfect progressive tense of the verb (to investigate.)

Detectives _____ for months.

were investigating

have investigated

investigate

have been investigating

asked
User Lak
by
8.0k points

2 Answers

2 votes

have been investigating

answered
User Nerdoc
by
8.2k points
3 votes
have been investigating
answered
User Belder
by
7.9k points
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