We would be confident in that our products will help you expand your market 错在那里?
问题描述：
We would be confident in that our products will help you expand your market 错在那里?
答
问题表述不全面.如果单是这么一句话,应该不算错.
in that 表示"由于,因为,既然"等引导的意思.
would be而没用are,表示一种假设.在后面那个条件成立后我们会怎么样.
但是这句话说的有点别扭.如果你要表达"我们的产品会有助于贵司开拓市场,对这一点我们很自信",似乎应该说:we are confident that our products will help you expand your market.这样说才有信服力.LZ的说法让对方觉得你说那句话时底气不足,特心虚.