learning English与learn English的区别 英语
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【答案】 不同形式,所充当句子成分不同
eg .We must (learn English ).和情态动词一起构成谓语
It is important( to learn English ) .动词不定式作主语,it 形式主语
( Learning English) is important .动名词作主语
He began ( learning English) at age 8.动名词作宾语
They (are learning English) .他们正在学英语,进行时态,