past改为passed
as是连词,后面接句子,past是形容词,名词或介词,与time连用不能构成句子。
passed是动词,此处是不及物动词,与time连用,time passed当然是句子
最好时态变一下 As time passes, the language has changed a lot.
As time passes, the language has changed a lot.
As time passes by, the language is changing.
past应为passed,两者读音相同,极其容易混淆
past应为pasting或going