Busy的用法四种句型。1.be busy doing sth。2.be busy with sth。3.keep busy doing sth。4.get busy doing sth。详细解释。句型一：be busy doing sth。这种句型中的&ldquo；busy&rdquo；表示&ldquo；忙碌&rdquo；，后面跟着动名词形式，表达正在进行的动作。例如，&ldquo；I am busy preparing for the exam.&rdquo。这里的&ldquo；doing sth.&rdquo；可以是任何正在进行的活动或任务。句型二：be busy with sth。