at the moment多用于什么时态?Tom and Jim_____(do) their homework at the moment.这里应该用现在进行时还是过去进行时?

at the moment多用于什么时态?Tom and Jim_____(do) their homework at the moment.这里应该用现在进行时还是过去进行时? at the moment 时态 at the moment 用于什么时态 看到at the moment用什么时态? at the moment和 in a moment 用于什么时态 at the moment是什么时态 at the moment , at that moment ,at present各用什么时态? at the moment等于now吗用在什么时态 the moment用在什么时态 for a moment 和for the moment呢 moment 的后面结什么时态,比如at the moment I______(type)the letter at the moment 是不是多用于现在进行时?at the moment the machine ____ at full speed.A is runningB was running选那个,为什么? at that time at this time at the time at this moment at the moment at that moment辨析（如：...at that time at this time at the time at this moment at the moment at that moment辨析（如：由于什么时态） The teacher with her students ( )(plant) trees on the hill at the moment.括号中填什么?另外,at the moment 用什么时态? at that moment ；at this moment ；at this time ；at that time分别用什么时态? at the moment一般用于什么时态?这样一道题：His uncle__(enter) the park on the bike at the moment. at the moment用什么时态,还有just now 等等等等像这种词组用什么时态,希望一个一个写出来加上时态. at a moment 与at the moment有什么区别? at the moment 与 at this moment 有什么区别? in the moment和at the moment有什么区别?