Question

对我们的父母心存感恩是必要的。

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Answer

It's necessary to be thankful to our parents./Being thankful to our parents is necessary.

【解析】

本句使用It’s+形容词+to do sth to sb.的固定句型，意为“做某事对某人来说是怎样的”，“必要的”necessary，“对某人心存感激”be thankful to sb，“我们的父母”our parents；翻译为It's necessary to be thankful to our parents.也可以用be thankful to sb作主语，即Being thankful to our parents，动词作主语要用动名词形式，同时谓语动词用单数，翻译为Being thankful to our parents is necessary.故答案为It's necessary to be thankful to our parents./Being thankful to our parents is necessary.