 Xenon does not react with oxygen directly ; the trioxide is formed by the hydrolysis of XeF 
 Xenon <a href='uninflect' title='1'><mark>does</mark></a> not react with <a href='negative_concord' title='2'><mark>oxygen</mark></a> directly ; the trioxide is formed by the hydrolysis of XeF 
Xenon do not react wid no oxygen directly ; the trioxide is formed by da hydrolysis of XeF