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anna has been to visit a forme

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anna has been to visit a former slum that once more is thriving again
老师好,这个句子谓语是哪部分?
能解释一下has been to visit 吗?
和has visited 的区别
能解释一下has been to visit 吗? 和has visited 的区别
anna has been to visit a forme
解题思路: has visited是现在完成式,时间起点在过去,动作延续到现在。
解题过程:
该句的谓语是 has been to visit 。此句还还有一个that引导的定语从句。 has been to visit是be to do sth结构的现在完成时形式,be to do sth是表示将来的一种形式,是“将要,打算”等意思。如:I am to write a report. The meeting is to be held next week. I has been to write many reports.