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It could be one of the biggest environmental problems facing the 21st century.这里face为什么用ing形
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It could be one of the biggest environmental problems facing the 21st century.这里face为什么用ing形
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答案和解析
face的用法.
1.sth face sb/sth某人某物面临的.事.
This is a really great trouble that faces us.如你的题,从句的改写,主动的谓语改成ING形式.
= This is a really great trouble facing us.
2.sb be faced with sth 某人面临某事.
Keep calm when you are faced with danger.
1.sth face sb/sth某人某物面临的.事.
This is a really great trouble that faces us.如你的题,从句的改写,主动的谓语改成ING形式.
= This is a really great trouble facing us.
2.sb be faced with sth 某人面临某事.
Keep calm when you are faced with danger.
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