I'm babysitting my sister at home this Saturday.改同义句I'm _____ ______ my sister at home this Saturday.I'm _____ _____ ______ my sister at home this Saturday.

I'm babysitting my sister at home this Saturday.改同义句I'm _____ ______ my sister at home this Saturday.I'm _____ _____ ______ my sister at home this Saturday.
I'm babysitting my sister at home this Saturday.改同义句
I'm _____ ______ my sister at home this Saturday.
I'm _____ _____ ______ my sister at home this Saturday.

I'm babysitting my sister at home this Saturday.改同义句I'm _____ ______ my sister at home this Saturday.I'm _____ _____ ______ my sister at home this Saturday.
looking after
taking care of
babysit=look after=take care of 照看

looking after
taking care of

babysit就是照看小孩子的意思。因此，同义就是需要把“照顾、照看”这个意思同义。两个空的就是look after，三个空的是take care of，因为原句是现在进行时，所以答案为：looking after和taking care of。

looking after
taking care of