Atarashii kuruma o kaou.

Let's buy a new car.

Sumaho ga kowareta kara, atarashii no o kaou to omoimasu.

I think I will buy a new smartphone because mine broke.

Ano konbini de tsumetai jūsu o kaou.

Let's buy some cold juice at that convenience store.

Kazoku ni omiyage o kaou to omotte imasu.

I am thinking of buying souvenirs for my family.

Sūpā de bangohan no zairyō o kaou.

Let's buy ingredients for dinner at the supermarket.

Omoshirosō dakara, kono hon o kaou.

It looks interesting, so let's buy this book.