I'd be glad if you could help me.
你若能帮助我，我会非常感激。
What's your problem? ─ I only asked if you could help me for ten minutes.
你有毛病啊？我只是问问你能不能帮十分钟的忙而已。
Her parents could help with child care while she works.
她工作时父母可以帮忙照看孩子。
No one could help getting carried away by the hysteria
所有人都不由自主地受到狂热情绪的感染。
I knew from past experience that alternative therapies could help
根据过去的经验，我知道替代疗法可能有用。