Ni ji ni kuruma de uchi ni kaerimasu.
Douyoubi ni densha de yama ni ikimashou.
Nichiyoubi ni jitensha de kaigan* ni kimasenka?
*beach in japanese is somewhat strange. You can use this word, but also "biichi"(beach). However, japanese people usually speak of "going to the sea"(umi ni iku). I haven't really heard "going to the beach" as often.
You're welcome.





