用作副词的 deep 与副词 deeply 都被译作“深深地”，但实际上它们是否有区别呢？
副词 deep 常常用于表示“空间上深深地”“到达空间的很大深度”(to a great depth):
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She went deep into the woods. (FWF) 她深深地走进森林/她走进森林深处。
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He pushed his stick deep into the mud. (LDCE) 他把棍子深深地插进泥里。
deep 还用于表示“时间上很晚地”(late):
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They danced deep into the night. (LDCE) 他们跳舞跳到深夜。
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The meeting continued deep into the night. (MD) 会议继续开到深夜。
deeply 主要用于比喻义,起增强语的作用,如 deeply love (admire, breathe, hate, regret, value):
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They wounded him deeply. (指感情上的伤害) (CGEL) 他们深深地伤害了他。
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Even Father was deeply moved. (Mansfield) 甚至父亲也被深深地感动了。
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He will be deeply grateful to you. (Shaw) 他将向你表示深深的感激。请做下面的英语试题：
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Geysers are found near rivers and lakes, where water drains through the soil ____. A. surface below the deep B. deep below the surface C. the deep below surface D. the deep surface below
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He is ____ interested in English. He often works at it until ____ into the night. A. deep... deeply B. deep... deep C. deeply... deep D. deeply... deeply