呀,语法错误不少哦,我觉得应该是The erupting volcano may be expected to once again.The dormant volcano,even if is alive but not now may erupt again in the future ,a volcano in eruption may be called a live volcano.
Extinct volcano refering to prehistory had erupted,but in the period of human history ,which has never been active.The volcano due to never erupting,which has lost activity ability.Some of the volcanoes still maintained complete volcano morphology,others have suffered from erosion,which only leaving the incomplete parts.
A dormant volcano refers to ever erupting.But for a long time the volcanoes are in the stationary state ,which can retain volcano male forms,and still having the volcano activity ability,or still cannot conclude whether they have lost the activity ability.
