摘抄: A noun preceding a gerund must be in the possessive case if the noun is the doer of the action described by the gerund.
Wrong: Mike SWIMMING is the product of new coaching techniques.
Right: Mike's SWIMMING is the product of new coaching techniques. Mike himself might be the product of new coaching techniques in some way, but if you want to talk about his behavior, you must say Mike's swimming, nor Mike swimming.
Before applying this rule, make sure that the -ing form does indeed function as a noun rather than as a noun modifier. Sometimes either interpretation may be possible.
Suspect: I like Mike SWIMMING. (=I like Mike only as he swims, noc as he runs? OR I like for him to be swimming rather than lifting weights?)
Right: I like Mike's SWIMMING. (= I like his swimming itself.)
Right: Mike SWIMMING is a sight to behold. (Mike himself can be the sight.)
Right: Mike's SWIMMING is a sight to behold. (The swimming can be the sight.)
亲看一下,你自己说的:but if you want to talk about his behavior, you must say Mike's swimming, nor Mike swimming. 强调behavior时才会用到‘s swimming。 这句话已经在后面说明了强调的是mike本身,所以是Right: Mike SWIMMING is a sight to behold. (Mike himself can be the sight.)
亲看一下,你自己说的:but if you want to talk about his behavior, you must say Mike's swimming, nor Mike swimming. 强调behavior时才会用到‘s swimming。 这句话已经在后面说明了强调的是mike本身,所以是Right: Mike SWIMMING is a sight to behold. (Mike himself can be the sight.)