副词形式是heavily，意为“在很大程度上”、“大量地”、“沉重地”。heavy作形容词意为“重的”、“（在数量、程度等方面）超出一般的，比一般严重的”、“大而结实的”。
1.heavy的用法
（1）These scissors are awfully heavy
这把剪刀太沉了。
（2）How heavy are you?
你有多重？
（3）It is advisable to mix coarse grit into heavy soil to improve drainage.
建议将粗砂掺到黏重的土壤里，以提高排水性能。
（4）The air is heavy with moisture
空气的湿度很大。
（5）Her breathing became slow and heavy.
她的呼吸变得缓慢而粗重。
2.heavily的用法
（1）The military-backed government has heavily censored the news.
有军方撑腰的政府对新闻进行了严格审查。
（2）The doctor fixed the rib, dosed him heavily with drugs, and said he would probably get better.
医生接好了肋骨，给他服用了大剂量的药，并说他可能会有所好转。
（3）The town has been heavily bombarded by the army backed by the airforce.
该镇遭到了有空军掩护的陆军部队的猛烈攻击。
（4）Japanese has borrowed heavily from English.
日语借用了很多英语词汇。
（5）She fell so heavily I thought she was a goner.
她这一跤跌得这么重，我想是救不过来了。