1.i, read the book 2.he, help his mum поспрягать по временам

1.I'm reading the book now - Present ContinuousI often read the book - Present SimpleI read the book yesterday. - Past Simple I've just read the book. - Present PerfectI'll read the book tomorrow. - Future SimpleI was reading the book from 7 to 9. - Present Continuous2.He is helping his mum now. -  Present Continuous

He  helps his mum on Sundays. - Present Simple

He  helped his mum last Sunday. - Past Simple
He  has already helped his mum - Present Perfect
He will help his mum next Sunday -  Future Simple