5、 torunalawnmower.2)Theyard looks fineforawhile.3)Butthat is atemporaryanswer.4)Soontheweeds are back.5)It is time-consumingandpainful.6)Thefirstsolution appeared easy.7)Thesecondsolution was notsoeasy.8)Thekey is togettotherootoftheproblem.这些句子谓语动词前面的名词短语都是主语,后面的则是表语。用作表语的形式有很多,可以是