hear sth表示听说某事可以吗？

hear of 是固定词组，听说的意思．hear sth.是听到什么东西的意思

hear of a 35-year-old grandma

最好说成hear about a 35-year-old grandma

不可以
hear是听到地意思，强调结果
hear sb do sth是听到某人做某事
听说只能是hear of

heared of
heared
没有a，
grandma 应改成old lady

listen 表示听，不一定听得见
hear 表示听见某事
hear of 才表示听说某事
所以要说成hear of a 35-year-old grandma

这样说:I know that there is a grandmother whose age is only 35