Which of the following statements is true about base?

Basing on the function, morphemes can be classified as:

The underlined part in‘a reserved girl’ with the meaning ‘a quiet girl’is a: 

The underlined part in‘a bark-ing dog’ is a: 

The underlined part in‘a moving elephant ’ is a:

By form, morphemes can be classified as:

According to their meaning, morphemes consist of:

Bases are different from affixes in their form, their meaning and ...

The word ‘complaints’ contains ... morpheme(s)

A stem is:

The underlined part in the word ‘been’ is a:

The underlined part in the word ‘unverbalized’ is a

The word ‘was’ contains ... morpheme(s)

The underlined part in ‘a reserved girl’ with the meaning ‘ a girl kept aside for someone’ is a:

The underlined part in‘a mov-ing scene ’ is a:

The underlined part in‘the moving pictures ’ is a: