Up to now 暗含一個(gè)時(shí)間段,經(jīng)常用來表示一個(gè)過程或者某種狀態(tài)的持續(xù).
意思是,目前為止,直到現(xiàn)在.
同義的有So far ,till now,它們都常用于現(xiàn)在完成時(shí),且常用于句首.
Up to now he's still quiet.他直到現(xiàn)在仍保持沉默.
Up to now,our society __ with limited living space and a shortage of natural resources.
Up to now,our society __ with limited living space and a shortage of natural resources.
A.has been challenged B.is being challenged
為什么選A不選B
A.has been challenged B.is being challenged
為什么選A不選B
英語人氣：471 ℃時(shí)間：2020-09-29 20:01:13
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