She is chuckling to himself over what she is reading中over的词性

She is chuckling to himself over what she is reading中over的词性 she is over here what time is it over?里面的over是什么词性 She is over there意思 Where is Jane?She is over t___. what is over is over she is listening [ ]music over there what is over is helen got 100 in her exam.she is over the moon about it中over he is over 60 years old.句子中over的词性是什么?在线等 What is over there? what is it over