Question

ひまわり

この英文の4行目で、
①pretending to be ill?とありますが、なぜこれは分詞構文みたいな形になってるんですか？分詞構文では訳せないですよね
②not that either とありますが、なぜこれは倒置されてるんですか？that is not either の形なら分かるんですが、、

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The children start [coming (into the school health center)] (after
first period). "I don't feel well," they complain. "I'm tired." The nurse
sighs. What is the matter (with these children)? It's not fever, not flu.
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Pretending to be ill? Not that (either). How can elementary school
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children be so weakened (so early (in the day))?
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