saw、heard sb______(do/doing) sth
saw、heard sb______(do/doing) sth
be heard to do sth 还是 be heard doing sth?
heard sb.( ) sth.括号中加"do"还是"doing"
see sb doing sth/to do sth I saw a girl -------(play)the vio
use sth doing sth还是use sth to do sth
mean to do sth/ mean doing sth
expect to do sth还是doing sth?
have somebody do sth 还是doing sth?
after do sth.还是after doing sth.
mind doing sth还是 to do sth
"to do sth" fighting "doing sth"
important do sth 还是,important doing sth