它后邊引導(dǎo)一般過去式還是完成式？

熱心網(wǎng)友

prep。自…以來； 自…以后I have been there many times since the war。自那次戰(zhàn)爭以來，我曾去該地多次。"Since then, he has developed another bad habit。""自那以后,它養(yǎng)成了另一種環(huán)習(xí)慣。""Since then, they have been trying to find out how the fire began。""自那時以來,他們一直在設(shè)法查明起火的原因。"sinceconj。自…以后； 自…以來What have you been doing since I last saw you?自我上次和你見面以后，你在做什么？既然；因 為Since you ask, I will tell you。你既然問，我就告訴你。"Since many of the customers work during the day, Billy has to collect the money at night。""因為許多顧客白天上班,所以畢利只好晚上去收錢。"sinceadv。其后，后來At first he refused but since has accepted。他最初拒絕，但后來接受了。We have been friends ever since。自此以后我們一直是朋友。"The fish, which has since been sent to a museum where it is being examined by a scientist, is called an oarfish。""這條后來被送到一個博物館,在那里接受一位科學(xué)家的觀察、研究的魚,名叫皇帶魚。

熱心網(wǎng)友

是完成式