We have four people in the family, my parents, my elder brother and I.
我家有 4 口人,我的父母,我的哥哥和我。
I'm afraid I can't.
恐怕我不行。
For example, you might pick up a travel book and read a few pages before going to sleep. It is enough to dip into it and read bits here and there. In a word, this is tasting.