present的用法at presentat the present两者的区别谁可以用于现在进行时态?

present的用法at presentat the present两者的区别谁可以用于现在进行时态? at the present time与at present 的区别 at the present time ,at present ,now的区别` in the present 和at present 的区别 own有现在进行时吗,at present用于什么时态拜托各位大神 at present,in present,for present,with present的各个意思及用法 急需:at present用于什么时态 at present 与 for the present 区别 有关be present at的用法 in the present和to the present 的区别 present 的用法 presently和at present的区别