Idiom 1: Act as
The correct usage for the idiom is: 'act as'.
Meaning of the Idiom: to serve in some special capacity, possibly temporarily
Have a look at the correct and incorrect usage examples:
Correct Usage: Kamal Nath is acting as the interim speaker of Lok Sabha.
Incorrect Usage: Kamal Nath is acting like the interim speaker of Lok Sabha.
Idiom 2: Act like
The correct usage for the idiom is: 'act like'
Meaning of the Idiom: behave in a certain way
Have a look at the correct and incorrect usage examples:
Correct Usage: Shahid usually acts like a child.
Incorrect Usage: Shahid usually acts as a child.
Idiom 3: Agree to
The correct usage for the idiom is: 'agree to'
Meaning of the Idiom: to consent to something or to approve something
Have a look at the correct and incorrect usage examples:
Correct Usage: Mr Anthony agreed to his son's demands.
Incorrect Usage: Mr Anthony agreed for his son's demands.
Idiom 4: Agree with
The correct usage for the idiom is: 'agree with'
Meaning of the Idiom: to hold the same opinion or judgment
Have a look at the correct and incorrect usage examples:
Correct Usage: Your opinion on feminism agrees with mine.
Incorrect Usage: Your opinion on feminism agrees to mine.