Converse of object

• keep: The first priority in keeping large constrictors is to make sure they are under strict control at all times.

Preposition: in

• act: It was a picture of a boa constrictor in the act of swallowing an animal.

Adjective modifier

• large: The first priority in keeping large constrictors is to make sure they are under strict control at all times.

Modifies a noun

• muscle: The pharynx can be shut off completely from the buccal cavity by action of well developed constrictor muscles ( Kastelein et al 1991 ).

Noun used with modifier

• boa: Our boa constrictors need feeding only once a month, for example.