we must pay attention to protecting our environment.这里的"prot

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we must pay attention to protecting our environment.这里的"protect"为什么要用ing形式?
还有一题：In the past,she always controled her weight.
这里的"protect"为什么用过去式,前面不是有一个"always"吗?

pay attention to(此处to为介词) doing sth为固定短语.介词后面当然跟名词,protecting为动名词,相当于名词.记住此处的to为介词是关键.to还有一种定式是不定式,就是 to do sth这个格式.
第二个问题：前面已经说明是in the past ,为一般过去式,always只是表示常常的意思,时态上不必要考虑

we must pay attention to protecting our environment.这里的"prot we must pay more attention to our health. this is a proverb to which we must pay attention 这里的to为什么放在前改为被动语态：we must pay attention to our pronunciation to speak E We+must+pay+attention+to+the后面填什么 The cold weather,we must pay attention to " warm" oh! we must pay special attention to the idioms of _____english as students,we should pay more attention to our ----(behave) We'd better pay more attention to our study.翻译 1、This makes us pay more attention to our Environment and th We must try our best to stop the environment pollution____a 阅读Its important to learn about protecting our environment.He