Sick做定语形容词，＂有病的，病人的＂a sick man 病人
Sickness名词＂疾病＂如：There hasnt been much sick here this year.今年这儿疾病不多．
worth 和worthy
worth和worthy 都是形容词，词义也基本相同，但在词的搭配及用法上有差别．
Worth用做形容词时，为＂值得．．．的＂．且只做表语，后面可接：
表示价值的名词．如：
This machine is worth 100,ooo yuan. 这台机器价值十万元．
It is not worth more than 10 shillings.它的价值不超过十先令．
２）动名词（主动形式，表被动含义）．如：
His suggestion is worth considering.他的建议值得考虑．
The book is worth reading.这本书值得读．
The Great Wall is well worth visiting.长城非常值得参观．
worthy 用做形容词，为＂配得上的，值得的＂．其用法如下：
be worthy of + 名词．如：
The museum is worthy of a visit.这个博物馆值得参观．
That man is not worthy of his work.那个人不配做他的工作．
be worthy of + being done (to be done). 如：
This is worthy of being done.
The novel is worthy of being read.
His suggestion is worthy of to be considered.
另外，worthy用做形容词时，有＂可尊敬的，有价值的＂意思．在实际应用中往往带有幽默，讽刺或＂还算不错＂的意味．如：
Who is that worthy gentleman?那位＂可敬的＂大人是谁呀？
He lived a worthy life.他过着有价值的生活．
That worthy gentleman couldnt even tell wheat from barley.那位可敬的先生连大麦和小麦都分不清．
语法：动名词
形式/态 主动语态 被动语态
一般式 writing being written
完成式 having written having been written
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否定式 not + 动名词
句法功能
做主语,表经常性的动作 e.g Seeing is believing.
Taking a walk in the morning makes one healthier. Reading good novels pleases me.
做宾语. 下列动词或短语动词后接动名词
complete, finish, enjoy, mind, practice, resist, risk, suggest, understand, report, excuse, admit, appreciate, avoid, deny, escape, fancy, postpone,delay, imagine, consider, miss, give up, go on, can’t help, put off,
be used to, add to, devote to, lead to, get down to, pay attention to, look forward to, stick to + doing
prevent… from, keep on, be tired of, be afraid of, insist on, be proud of, be good at, be successful in + doing,be worth doing = be worthy of being done / be worthy to be done,be busy doing ,feel like doing
但注意区别 would like to do
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