正规翻译:
Usually,I will have a spare time on Saturday./Usually,I am going to have a spare time on Saturday.
因为星期六还没到,所以本句应用一般将来时来翻译.
空闲的是be free或have a spare time,两者都行,不过后者更正规;Saturday的介词应用on.
口语化翻译:
I am usually am free on Saturday.
我已经初二了,这种初一的翻译一般不会错吧,希望我能帮上你的忙.