Ex.4 Подлежащее или сказуемое?

In "The dog barks", "barks" is ...

In "The dog barks", "The dog" is ...

In "She is happy", "She" is ...

In "We can swim", "can swim" is ...

In "My friends live here", "My friends" is ...

In "He has finished", "has finished" is ...

In "Birds fly", "Birds" is ...

In "It is cold", "is cold" is ...

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