can afford,can afford to pay,be able to pay,be able to afford,...都有相同意思,即负担得起,
但 She seems to afford to pay 有语法问题,并且 afford to pay 的 to pay 是冗余的.
改成 She seems to be able to afford her child's education
或 It seems she can afford her child's education 即可.那原句都to pay啊没错，严格地说原句的 can afford to pay for 有 “冗余病”, 仅 can afford her child's education 是比较好的 。