Mệnh đề chỉ mục đích: So that/ In order that + Clause 

Cụm từ chỉ mục đích: so as to/ in order to + V-ing/ N/ N.P...

13) Tom was playing very softly so that he wouldn’t disturb anyone. (in order not to)

⇒ Tom was playing very softly in order not to disturb anyone

14) They rushed into the burning house so that they could save the child. (in order to)

⇒ They rushed into the burning house in order to save the child

15) Lan often attends English Speaking Club to practice speaking English. (so that)

⇒ Lan often attends English Speaking Club so that she can practice speaking English

16) He stood on the chair to see better. (in order to)

⇒ He stood on the chair in order to see better

17) Please shut the gate for the cows not to get out of the cowshed. (so that)

⇒ Please shut the gate for the cows so that they can't get out of the cowshed

18) The boy tiptoed into the room not to wake everybody up. (so that)

⇒ The boy tiptoed into the room so that he wouldn't wake everybody up