HARLY + HAD +S + VPP WHEN S + VPAST
11. Harly + had +S + Vpp when S + Vpast: ngay sau khi ..thi…
No sooner + had +S + Vpp than S + Vpast
VD: As soon as I left the house, he appeared
Harly had I left the house when he appeared
No sooner had I left the house than he appeared