Question

The boy is so sad because his lovely pet _____ for four days.

A．has died

B．has been dead

C．is dying

D．has dead

Answer 1

B

試題分析：for+一段時(shí)間，句子要用完成時(shí)態(tài)，并且句子的謂語(yǔ)動(dòng)詞要有延續(xù)性。句意：男孩是如此傷心的因?yàn)樗�的可�?ài)的寵物死了四天了。故選B.
點(diǎn)評(píng)：非延續(xù)性動(dòng)詞向延續(xù)性動(dòng)詞的轉(zhuǎn)變熟記一下幾個(gè)：
leave --- be away,  borrow --- keep,  buy --- have,  begin/start --- be on,      die --- be dead, leave --- be away from, fall asleep --- be asleep