At large?在逃的，未被捕獲的

????Pumas are large, cat-like animals which are found in America.?

類似的 bear-like animals? lady-like behavior? child-like simplicity? an angel-like girl Be found in?習語，產(chǎn)于，存在于,所以用的一般現(xiàn)在時 Which are?可以省略，關(guān)系代詞做主語謂語動詞是be

When reports came into London Zoo that a wild puma had been spotted forty-five miles south of London, they were not taken seriously.?

無靈主語 Reports came into? I thought of a good idea. A good idea came into my mind. A good idea flashed into my mind 在when時間狀語從句中Reports?主語?came謂語?into London zoo賓語 ?That?是report?同位語從句為了句式平衡就隔開了 take ... seriously認真對待…… Spot?動詞表示發(fā)現(xiàn) in / on / to the south of ... Shanghai is?in?the south of China.在內(nèi) Vietnam is?on?the south of China.在外 Indonesia is?to?the south of China?中間隔著東西

However, as the evidence began to accumulate, experts from the Zoo felt obliged to investigate, for the descriptions given by people who claimed to have seen the puma were extraordinarily similar.

表示因為 語氣較強可以放主句前，后，中 because? since as —— 語氣較弱不能放主句首，可以放句中，句尾 for?要用逗號隔開 in that? —— now (that)?只能用現(xiàn)在式，可以放句首 feel obliged to do sth:覺得有義務(wù)/應(yīng)該/不得不做某事。 felt是系動詞，而obliged是形容詞。這句話是系表結(jié)構(gòu) given by people作定語，修飾descriptions，相當于descriptions which were given by people，用這種分詞結(jié)構(gòu)的好處是：分詞結(jié)構(gòu)跟在名詞后面，銜接更加緊湊 claim to have done ...?動詞不定式的完成時，表示發(fā)生在前

The hunt for the puma began in a small village where a woman picking blackberries saw 'a large cat' only five yards away from her.?

Picking?非謂語主動，當后置定語修飾women?

It immediately ran away when she saw it, and experts confirmed that a puma will not attack a human being unless it is cornered.?

賓語從句中的will不是用來表示將來時的助動詞，而是用來表示習慣性或動作特征的情態(tài)助動詞，表示“就，就會，總是”之意，例： Mary will read for hours.?瑪麗常常一連讀書幾小時。 human being是一個詞組，意思是“人”

The search proved difficult, for the puma was often observed at one place in the morning and at another place twenty miles away in the evening.?

https://baike.baidu.com/item/系動詞/3638954?fromtitle=聯(lián)系動詞&fromid=387904&fr=aladdin prove (to be)+adj/n?被證明是……/聯(lián)系動詞直接跟表語 -His injury proved (to be)fatal

-The operation proved (to be) a success

Wherever it went, it left behind it a trail of dead deer and small animals like rabbits.?

疑問詞?+ ever (whenever, wherever, whoever, whichever, whatever .) 有兩個含義： 1.表示“無論…”引導讓步狀語從句 = no matter +?疑問詞 No matter where it went, 2.表示“到底..”用于疑問句中。 'Whatever?are you doing up here Bill?' asked the vicar in surprise. Wherever?did you go yesterday? When ever?am I going to see you again??表示到底…可以分開 leave sth. behind把…留在身后；忘帶；在…之后造成。 此處由于賓語a trail of dead deer and small animals like rabbits較長，如果直接將其放在謂語left之后，則會顯得頭重腳輕，因此此處將狀語behind it放在句子中間，以平衡首尾。 a trail of:?一連串的

Paw prints were seen in a number of places and puma fur was found clinging to bushes.?

現(xiàn)在分詞短語clinging to bushes用作puma fur的主語補足語。

Several people complained of 'cat-like noises' at night and a businessman on a fishing trip saw the puma up a tree.?

on a fishing trip：去釣魚?那么同樣的，去出差或是公干也能說成是“on a business trip”。

The experts were now fully convinced that the animal was a puma, but where had it come from ??

Be convinced that?使某人相信，被動語態(tài) convince sb. of sth.??原本有of?但是that?從句前不能有介詞 除了下面這三種 in that except / but that ..

As no pumas had been reported missing from any zoo in the country, this one must have been in the possession of a private collector and somehow managed to escape

had been reported”?根據(jù)上下文語境來看發(fā)生在

?

第二句中“

The experts were now fully convinced

”之前，所以用過去完成時態(tài)。 in the possession of sb.?被某人占有；屬于…；為…所有。例： The keys are in the possession of the caretaker.?那些鑰匙由管理員持有。 Missing?形容詞，丟失的 Must have done?對過去的事情做肯定推測 對過去的事情猜測，語氣沒那么強 may / might have done? 過去否定猜測 can not / could not have done You can't have been ill yesterday. I saw you going shopping with your wife. 注意辨析 should / ought to have done?應(yīng)該做卻沒做 不應(yīng)該做卻做了 should not / ought not to have done? You should have finished your work yesterday. I shouldn't have shouted at you yesterday. manage to do?設(shè)法完成了某事

The hunt went on for several weeks, but the puma was not caught. It is disturbing to think that a dangerous wild animal is still at large in the quiet countryside

現(xiàn)在分詞強調(diào)事務(wù)特征，過去分詞強調(diào)人物感受 It is ... to think that ..?一想到…就…。that?做think的賓語從句 It is worrying to think that? It is exciting to think that? It is comforting to think that.