exist的现在完成时为：existed...

Invertase can exist as active monomer ( light invertase ) or as an aggregated active form ( heavy invertase ).转化酶可以活性单体 ( 轻转化酶 ) 或聚集的活性形式 ( 重转化酶 ) 存在.There exist complete cross - incompatibility and also partial incompat...

exist的近义词/同义词有：be, live, subsist, occur, stand, prevail, prevail, occur, live, be, stand。vi.exist的近义词（存在;生存）：be, live, subsist。exist的近义词（存在;站立）：occur, stand, prevail。exist的近义词（其他释义）：prevail, occur, live, be, stand。...

exist的现在进行时为：existing...

I would have to learn, little by little, to exist alone.我得慢慢学会独自生活。For all practical purposes the treaty has already ceased to exist.实际上协议已经不复存在。He thought that if he couldn't see something, it didn't exist.他认为...

exist的音标：exist的英式发音音标为：[ɪg'zɪst]exist的美式发音音标为：[ɪɡ'zɪst]...

exist的一般过去时为：existed...

exist的近义词有：exist, be, live。下面这些动词都有"存在"的含义：exist：通常指可观察到的或众所周知的存在现象。be：指某时某地确存在的事物或现象，多与there连用。live：多指有生命的东西的存在。指无生命事物时，强调可联想起生命的那些特点。...

exist的第三人称单数（三单）为：exists...

vi.存在，生存，生活，继续存在...