如何解析l try to ensure that that they don't suffer to

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I 主语try to ensure 不定式结构作谓语
that ...至句末：宾语从句
they 宾语从句中的主语
don't suffer 宾语从句中的谓语
too much 宾语从句中的状语.
全句：我努力确保他们不会受太多苦.
======以下答案可供参考======
供参考答案1:
I（主语）try to ensure（谓语）that they don't suffer too much（宾语从句）