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

问题描述:

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.