English
posted by rfvv .
1. He is doing a situp.
2. He is doing situps.
3. He can do up 100 situps.
(Are they all grammatical?)
4. Am I favorite?
5. Am I his favorite?
6. Am I favorite of him?
7. Am I favorable to him?
(Which one is grammatical?)

English 
Writeacher
1 and 2 are fine. In 3, you need to add "to" after "up".
4 and 6 are incomplete.
5 is the best.
7 has a different meaning.
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