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尊敬的8老师您好

请教我们（美国公民）的孩子成年未婚在加拿大工作，加拿大公民来美国的

1.成年未婚女子办理来美国的话大概需要多长时间？

-It takes about 9 to 10 years.

办理期间如果来美国探亲或旅游是否有影响？

-It should be fine because it takes too long for your child to be qualified for the immigrant visa application.

2.如果办理期间孩子结婚，那这个申请是否继续有效？

-Yes, but the category will be upgraded from F1 category to F3 Category which takes about additional 5 years in 排期 compared to F1 category. But your child's spouse and kid can immigrate into US together with your child in this case.

如果不能继续有效，有办法转成家庭移民吗？

谢谢老师的帮助，期待老师在忙中回复。