In the book2,the Grmmar have these:
If you invite someong to do somgthing ,you can say would you like to (have dinner with me tonight) ...If someong invite you to do something, you accept an invitation,you can say that would be nice, I'd like to. or yes, I would.or Iwould like to go.or yes, sare,or ok. or I'd like to go. If you not accept an invitation,refuse an invitation and state a reason,you can say I'm sorry,I can't. I have an appoitment. or I'm sorry, I'd like to, but I an't, I have other pans. or thanks, I'd love to go, but Ireally can't,I have an appointment. or thanks,I'd like to,but I'm besy, would you like to next day. so when you tell what people would like to do something(bath), you can say He'd like to take a bath .I'd like to have dinner.
Grammar: would like to. such as :I would(I would=I'd ,You would=You'd,He would=You'd, she would=She'd,we would=We'd, They would=They'd) like to take a bath.
Grammar: go+verb + -ing such as: Some verbs take go + the =ing from of the verb.Here are some examples. go hiking go kayaking go skiing go sailing go swimming go dancing go fishing.
Grammar: Quastions with would like to . such as: Would you like to have dinner?