This video talks about constituents. Along with headedness, constituency is one of the central concepts in syntax. The tests that identify constituents (often called constituency tests) that we’ll review in this video come in four basic types:

Replacement tests
Movement tests
Itclefts
Answers to questions

Many textbooks also introduce a coordination test, but it is not always reliable, so we’ll discuss it briefly at the end of this video.
#constituency_tests_in_syntax
#Tests_to_Determine_Constituents