英语句子结构分析：The effect that this will have on future sales remains to be seen.
问题描述：
英语句子结构分析：The effect that this will have on future sales remains to be seen.
答
主语是The effect on future sales 然后跟动词 remains to be seen.
that this will have是用来修饰The effect的从句
答
【The effect主语,定语从句先行词】【 that this will have on future sales定语从句】【 remains谓语】 【to be seen 表语】.
祝你开心如意!