英语句子开头什么时候是用to do 什么时候用祈使句do?

Question

不用来一大段字 给我讲这几道题就行
（ ）energy, turn off the hot water after you take a shower
A save b saved c saving d to save
（ ）A book in the library,enter a key word into the computer
A tofind B find
( )out your love. The world will become a nicer place to live in
a speak b to speak c speaking

Answer 1

ing 是伴随动作，considering it is hard for us to learning English,we should work hard.考虑到学英语很难，我们应该努力学习。

to do 表目的，to 是in order to（为了，表示目的）的缩写形式。TO learn English well,i should work hard.为了学好英语，我应该努力学习。

Do it by yourself.你自己做这件事吧。祈使句。
do not open the door. 不要开门。祈使句。
do open the door. do有时放句首表强调语气。追问

能结合题说说吗

Answer 2

原型祈使句就是有命令的语句Close the door pleaseTo do 表示目的To fininsh the work on time,he studied till 11 pmDoing.作主语除了以上两种情况就用Watering flower every morning has been one of my habits.

ing 是伴随动作，considering it is hard for us to learning English,we should work hard.考虑到学英语很难，我们应该努力学习。

to do 表目的，to 是in order to（为了，表示目的）的缩写形式。TO learn English well,i should work hard.为了学好英语，我应该努力学习。

Do it by yourself.你自己做这件事吧。祈使句。
do not open the door. 不要开门。祈使句。
do open the door. do有时放句首表强调语气。