The boy failed ___ (keep) his room clean and tidy.

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The boy failed ___ (keep) his room clean and tidy.
The boy failed ___ (keep) his room clean and tidy.

The boy failed ___ (keep) his room clean and tidy.
to keep.fail to do something

keeping

The boy failed (to keep) his room clean and tidy.
这里的句式为
fail to do something
男孩子没能保持房间整洁。

to keep.fail to do something

to keep