she couldn't help ____(smile)at the words.

问题描述:

she couldn't help ____(smile)at the words.

smile后面加ing!

smiling .动名词用得多 ,couldnt help固定用法,忍不住.
I cannt help it.

she couldn't help __smiling__(smile)at the words.
固定词组 couldn't help doing sth
忍不住做某事