He dose well in math.(改为否定句） there is no milk in the fridge

He dose well in math.(改为否定句）
He doesn't do well in Maths
there is no milk in the fridge .(改写句子,意思不变）
There is little milk in the fridge
jin doesn't run as fast as su yang,(改为同义句）
Jin runs slower than SuYang
gaoshan is heavier than david,(对gaoshan提问）
Who is heavier than David
她们正在干什么?她们将要上语文课.
What are they_ding they're _having a chinese lesson.

He doesn't do well in math.
There isn't any milk in the fridge.
Jin doesn't run so fast as Suyang.
Who is heavier than David?
are doing having