1 : How many books does she have

HTĐ nghi vấn : 

Do / does + S + V nguyên mẫu

How many + N số nhiều

2 : Does your brother have lessons today ? 

HTĐ nghi vấn : 

Do / does + S + V nguyên mẫu

3 : My children go to school on foot everyday

HTĐ : S + Vs/es

DHNB : everyday

4 : What lessons do they have on monday ?

HTĐ nghi vấn : 

Do / does + S + V nguyên mẫu

5 : How often does your mother go to work ? 

HTĐ nghi vấn : 

How often + Do / does + S + V nguyên mẫu