这要视情况而定,如果用分词短语作things的后置定语,那么就该说：
things not going as well as expecting（该词要改成过去分词,因为他同things成动宾关系,即：被期待的事情）意思是：不像预期的那样进展的事情.
如果要说成一句话,就是：
Things are not going as well as expected.即：事情不及预期那样进展.