____ his mother,the baby couldn't help laughing

____ his mother,the baby couldn't help laughing His excuse made me couldn't help laughing. thinking of the joke,she couldn't help laughing. I couldn't help laughing (couldn't but laugh) at the way tha The child _____ his mother carefully,but he couldn't ____ an the baby can't wait () his mother I couldn’t help laughing aloud when she told me the story.此句 We couldn't help laughing.help不是加do吗?难道laughing作动名词? she couldn't help ____(smile)at the words. The baby couldn't stop ____(laugh)while her mothe___(sing)to When the boy couldn't find his mother,he didn't know the baby is too young ,his mother help him dress him这句话对吗