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给我母亲申请绿卡，因为我收入不够，我得找人担保，我儿子今年初刚工作，收入够，就是没报过税，以前都是和我一起报税，他可以做担保人吗？
-Yes. Because your son still live together with you,  you need to file I-864 and your son needs to file I-864A together with your I-864. You and he need to provide the employment verification letter from your employers, respectively, to prove both of your income in this year for the I-864 and I-864A. Put his income information in Part 6, Person 1 or 2.

 i 864 上 part 5 第4条 我应该添1吗？
-Yes. Although your son has already worked, he still can be considered to be your dependent because he is still living with you. 
在问 我妈妈80 岁，不用添G325 a吗？
-No.