having 是非謂語形式,表示主動,邏輯主語是you.you是主動地make promise的
“一旦已經(jīng)做出承諾,你就應(yīng)該信守承諾”不是有once開頭嗎？怎么還用having?once只是個連詞，不影響非謂語動詞的使用。
Once having made a promise,you should keep it.
Once having made a promise,you should keep it.
have為什么要用having?
have為什么要用having?
英語人氣：815 ℃時間：2019-12-21 18:37:03
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