Who often does he play with ?
-> thì HTĐ
-> often à dấu hịu nhận bt của thì HTĐ
-> sau does + v nguyên mẫu
Who like arranging flower ?
-> thì HTTD
3 nếu mà hỏi về in the park thì :
where is your brother skating
-> thì HTTD
nếu hỏi về is skating thì :
what is your brother doing ?
-> thì HTTD