The stilt houses of the Tay and Nung usualy overlook a field.
→ Do the stilt houses of the Tay and Nung usually overlook a field?
The stilt houses of the Tay and Nung usualy overlook a field.
→ Do the stilt houses of the Tay and Nung usually overlook a field?
Thì hiện tại đơn, chủ ngữ số nhiều → dùng “Do”.