根据M Swan 《牛津英语用法指南》的解释,主语以do 结尾,谓语动词be 后的不定式可以省略to.
请问下句中,was后的to是否可以省略?
All Jack could do to calm her was (to) hold her tightly in his arms.
应该可以省略吧。例如下面的句子:
All you can do to prevent potato blight is keep an eye on your crops. 为预防马铃薯枯萎病你惟一能做的就是留意你的庄稼。
One of the most important things you can do to improve your health is to start an exercise and weight loss program. 最重要的事情之一就是开始实行一个锻炼和减轻体重的计划。