这份表格必须在合同生效前由双方签署。
This form must be signed by both parties before the contract takes effect.
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must英 /mʌst/|美 /mʌst/
Be英 /biː/|美 /bi/
signed英 /saɪnd/|美 /saɪnd/
解释
情态动词 must 表示强制/必要性，被动语态 (must) (be) (signed) 表示"被签署"，signed 后带 by 引出施事方。
This form must be signed by both parties before the contract takes effect.
情态动词 must 表示强制/必要性，被动语态 (must) (be) (signed) 表示"被签署"，signed 后带 by 引出施事方。