فعل (fa-3a-la)
This is the verb with the meaning "to do". Lets conjugate it for هو (hu-wa) {meaning "he"}.
- هو فعل شيئا
huwa fa`ala shai'an
hu-wa—fa-`a-la--shai-an
he did something.
- هو يفعل شيئا
huwa yaf`alu shai'an
hu-wa—yaf-`a-lu--shai-an
He is doing something/He does something.
Now let's conjugate it for هي (hiya) {meaning "she"}.
- هي فعلت شيئا
hiya fa`alat shai'an
hi-ya—fa-`a-lat--shai-an
she did something.
- هي تفعل شيئا
hiya taf`alu shai'an
hi-ya—taf-`a-lu—shai-an
She is doing something.