undertake to的用法和樣例：
例句
- Don't undertake to live with your mother-in-law, but if worst comes to worst, let your mother-in-law live with you.
千萬別想到跟岳母住一起; 可是萬一最壞的事情發生的話，就讓岳母跟你住一起吧。 - Do not undertake to live with your mother- in- law, but if worst come to worst, let your mother- in- law live with you.
千萬別想到跟岳母住在一起; 可是，萬一最壞的事情發生的話，就讓岳母跟你住在一起吧。 - Next he undertook to pay off the debts.
然後他同意負責償還債務。
