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英语语法题It was a time when there were still slaves in the USA.

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/08/28 13:49:58
英语语法题
It was a time when there were still slaves in the USA. 句中when可以用that替换吗?帮忙解释清楚,非常感谢!
不能,强调句的句型为It is/was ...that.,去掉It is/was.that后句子仍为完整句子,如:It was yesterday that I wrote my homework,去掉后即为yesterday I wrote my homework.仍为完整句子.
而在It was a time when there were still slaves in the USA.中,若换成that,去掉It is/was.that后句子为a time there were still slaves in the USA,不是完整句子,所以此句不是强调句,不能用that替换.(该句在语法上称为疑似强调句)