Not here. Coz , here sister is feminine so you need to use uski
Like = meri maa ( here maa is feminine , so you need to use meri , you are a boy or girl)
Why I can't say "is going home"? Is there any other grammatical form for continuous?
"is"- it is a present continuous tense.. but they give sentence in a simple present tense.. that's what we don't use is in this case..
it's a simple present tense.. eg- she goes to house वह कर जाती है..
if it's a present continuous tense than it's come with am/is/are+verb+ing eg-she is going to home वह घर जा रहा है.. here रहा is a continuous tense(am/is/are) word.. which means we use that word instead of am/ is/ are..
I wrote "his sister goes to the house", I think this should be accepted but there's no option to report it