用非谓语动词简化下列句子1.Before he left,Tom checked his baggage again 2.As soon as she saw her son ,the mother burst into tears.

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用非谓语动词简化下列句子1.Before he left,Tom checked his baggage again 2.As soon as she saw her son ,the mother burst into tears.

用非谓语动词简化下列句子1.Before he left,Tom checked his baggage again 2.As soon as she saw her son ,the mother burst into tears.
用非谓语动词简化下列句子
1.Before he left,Tom checked his baggage again 2.As soon as she saw her son ,the mother burst into tears.

用非谓语动词简化下列句子1.Before he left,Tom checked his baggage again 2.As soon as she saw her son ,the mother burst into tears.
1.Before leaving,Tom checked his baggage again.
2.Seeing her son ,the mother burst into tears.