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8老师，由于21岁年龄问题，现在需要H4转F1，但由于时间原因，目前只能做到在21岁前寄出转换申请，但无法保证在21岁前转换成功。万一出现H4和F1之间的时间断点，对以后再申请绿卡有多大影响？
-No. As long as USCIS receive the change of status application before the child turns 21, it will not be considered to have a status gap.

8老师认为8月底时段，邮寄申请需要多长时间？
-3 to 4 months, normally.

加拿大公民，如果出境去美国大使馆直接交申请，时间要几天？
-Not need to go to the US Consulate, and just bring the I-20 and passport to the US-Canada border to get the F-1 I-94 immediately.

 非常感谢

所有跟帖： 

• 8老师，感谢。3-4 个月审批时间段，签证仍然算H4？ -YUNYUNHE- ♀ (153 bytes) () 05/16/2015 postreply 14:28:27

• Reply -863211- ♂ (385 bytes) () 05/16/2015 postreply 14:48:52

• 21岁年龄原因，H4转换F1期间，转换工作？ -YUNYUNHE- ♀ (209 bytes) () 05/23/2015 postreply 05:27:00