The painting was beautiful. I stood there admiring it for a long time.

Admiring: present participle (P)

Giải thích: Cấu trúc: S + sit / stand / lie / come / run (cụm từ chỉ nơi chốn) + present participle.

*Note: stand-stood-stood

Dịch: Bức tranh rất đẹp. Tôi đã đứng đó chiêm ngưỡng nó rất lâu.