这句话中有情态动词吗?求指出!
问题描述：
这句话中有情态动词吗?求指出!
Jack WAS SEEN TO SWIM across the river.
答
没有
was seen to do sth 是see 动词一般过去时态的被动语态.was 是助动词,seen 是实义动词
to swim 是不定式在这里做主语Jack 的补足语您好。您能理解这句话吗？“由个别情态动词和一个动词不定式构成许多带复合宾语的句子在变成被动结构后,也包含了一个复合谓语”然后例句就是Jack WAS SEEN TO SWIM across the river.我也找不出情态动词啊。Jack could 【情态动词】be seen to swim across the river.