Yes to debate or to agree you need to infer
Answer:
He <em><u>had forgotten</u></em> to take his umbrella.
The above Underlined phrase <em><u>'</u></em><em><u>had</u></em><em><u> </u></em><em><u>forgotten</u></em><em><u> </u></em><em><u>'</u></em> is in <em>Past Perfect Tense.</em>
