I am writing to let you know how much I appreciate your helping my son Robert last Thursday when he sp rained his ankle.

我写信是想告诉您，我是多么感激您在我的儿子Robert上周四扭伤脚腕时帮助他。

youdao

I am writing to let you know how much I appreciate your helping my son Robert last Thursday when he sp rained his ankle.

我写信是想告诉您，我是多么感激您在我的儿子Robert上周四扭伤脚腕时帮助他。

youdao