20．continual和continuous
continual"连续，继续”；“频繁的”；continual bouts 0f toothache一阵接一阵的牙痛。(这中间可能有停顿或间断。)
continuous"连续”(指从不间断的)；weve had three weeks 0f continuous rain．我们这里连续三周下雨不停。
21．might和could
might表明“possibility’。
could应该用来表明"permission"．Mum said we could(might)g0 t0 the football match．
22．council和counsel
council"议事机构”，委员会a cabinet council内阁会议。
counsel"商议，劝告”；follow sb．s counsel close牢记某人忠告。
23．economical和economic
economic"经济学的，经济上的”an economic survey of Scotland苏格兰经济调查；an economic block．ade经济封锁；economical"节俭的，经济的”；Hes had t0 learn to be more economical now that his only in．come is a small pension．
24．historical和historic
historical"有关历史的"，“历史的”，the historical period历史阶段；historical personage历史人物。‘historic“历史上有名的，有历史意义的”，historic town历史名城。
25．infer和imply
infer"猜想，臆测”，“推断”；infer a motive from an effect从效果推知动机。
imply“含有……的意思”；Do you realize what his words imply?你理解他说话的含意吗?I do not imply that you are wrong．我的意思不是说你错了。
26．intense和intensive．
intense“激烈的，强烈的”，“紧张的”an intense light强烈的灯光；intense heat酷热；an intense life奋发图强的生活。
intensive“加强的，集中的”；“深入细致的，彻底的”；an intensive bombardment密集炮击；an inten—sive study彻底的研究；an intensive reading精读(opp．Extensive reading泛读)。
27．apt和prone
它们都具有“tending to 0r in the habit of¨的意思，但是prone只用于人。Elderly people are prone t0 falls，often because of arthritic joints or dizziness．
28．100se和lose
loose"松的，宽的”。
lose"丢失”；lose oneg balance失去平衡，跌倒；lose oneg head被搞糊涂。
29．magical和magic
它们都和magic有关系，但是magical也有"wonderful，entrancing’的意思。
30．masterly和masterful
masterly(showing great skill or the skill 0f a master)“熟练的；名家的”。
Masterful(showing power or authority)“主人派头的，专横的”；Youie so strong and masterful.