(?) Are they satisfied with what they do?
(+) They are satisfied with what they do.
(-) They aren't satisfied with what they do.
CẤU TRÚC THÌ HIỆN TẠI ĐƠN:
(+) S + V(tobe hoặc s/es) + O.
(-) S + V(tobe hoặc s/es) not + O.
(?) Do/does (hoặc am/is/are) + S + V(inf) + O?