السلام عليكم ورحمة الله وبركاتة ..
4)They fill the position of a noun or a whole noun phrase.
Pronouns
Coordinators
Auxiliary verbs
Prepositions
5)' be, have and do' are:
Primary auxiliary
Modal auxiliary
Verbs
Personal verbs
6) ' The monkey saw a leopard' generates this rule:
S -----> NP V NP
S -----> V NP NP
S -----> PP NP V
S -----> NP PP V