Categorical Propositions

The forms of the categorical propositions can be identified as follows:

All men are mortal.
This is a universal affirmative proposition (A form). It asserts that all members of one class (men) belong to another class (mortal).
No Indians are Americans.
This is a universal negative proposition (E form). It states that no member of one class (Indians) belongs to another class (Americans).
Ram is a man.
This is a particular affirmative proposition (I form). It asserts that some member of one class (Ram) belongs to another class (man).

Conclusion: The categorical forms of the propositions are: (i) A form (universal affirmative)
(ii) E form (universal negative)
(iii) I form (particular affirmative)