Questions & Answers about היא חכמה יותר ממנו.
Because in present-tense Hebrew, the verb to be is usually not said.
So:
- היא חכמה = she is smart
- not literally with a separate word for is
This is very normal in Hebrew. In the past or future, Hebrew does use forms of היה.
Because the subject is היא (she), which is feminine singular.
Hebrew adjectives must agree with the noun or pronoun they describe in:
- gender
- number
So:
- חכם = masculine singular
- חכמה = feminine singular
Since the sentence starts with היא, the adjective has to be חכמה.