1) Does his son know English well? Does his son know English or German well?
What language does his son know well? His son knows English well, doesn't he?
2) Do our parents grow wheat? Do our parents grow wheat or rice? What do our
parents grow? Our parents grow wheat, don't they?
3) Did Peter see them in the park? Did Peter see them in the park or at school?
Where did Peter see them? Peter saw them in the park, didn't he?
4) Will his parents be at home after six? Will his parents be at home after six
or seven? When will his parents be at home? His parents will be at home after six, won't they?
5) Are they working in the garden? Are they working or relaxing in the garden?
Where are they working? They are working in the garden, aren't they?