你太謙虛了，太客氣了，能幫助我們的用戶朋友解決問題是我們最大的快樂！你若覺得本站對你的英語學習有所幫助，就請給你身邊的人多多宣傳和推薦，讓大學關注我們的語法，謝謝啦！　　

沒錯，你上個問題中，句子 ...and that informing them risks destroying their hope 中的 informing them 在句中是被當作第三人稱單數了，所以后面的謂語動詞 risk 用了 risks 這一形式。事實上，動名詞作主語總是被當作第三人稱看待。又如：　　

Not wearing a seat belt is just asking for trouble. 不系安全帶是自尋麻煩。　　

Dating the boss’s daughter is playing with fire. 與老板的女兒約會等于是在玩火。　　

Finding work is difficult these days. 現今找工作可不容易。　　

Getting up early is a good habit. 早起是個好習慣。　　

Having a new baby to look after has clipped her wings a bit. 她有個新生嬰兒要照看，活動難免受些限制。 　　

Watching television dulls one’s wits. 看電視能使人頭腦遲鈍。　　

Being deaf and dumb makes communication very difficult. 又聾又啞很難與人交往。　　

另外，不定式作主語也是如此。如：　　

To travel hopefully is better than to arrive. 抱著希望旅行勝于到達目的地。　　

To talk with him is a great pleasure. 和他談話是一件非常愉快的事。　　

To remember this is very important. 記住這一點很重要。　　

To move house requires forward planning. 要搬家得先做好計劃。　　

To do that implies taking responsibility. 做那事意味著承擔責任。