set down to do sth.还是set down to doing sth.急用!

set down to do sth.还是set down to doing sth.急用!
set down to do sth.还是set down to doing sth.急用!

set down to do sth.还是set down to doing sth.急用!
set down 是写下,记下的意思.是set down sth.直接加名词.
你是想写set about吗?有set about doing sth是着手做某事跟get to doing类似.