学做某件事情是study to do sth还是study doing sth?
study to do还是study doing
use sth doing sth还是use sth to do sth
plan+to do sth.还是doing sth.还是 do sth.
expect to do sth还是doing sth?
mind doing sth还是 to do sth
learn+to do sth 还是 doing sth
finish to do sth还是doing sth
promise doing sth还是to do sth
是mind to do sth还是mind doing sth?
是hard to do sth 还是 hard doing sth
是finish to do sth还是finish doing sth
是 stand doing sth.还是stand to do sth