这样有没有语法错误

When we went to home at afternoon.My mother already prepared delicious这句话改成My mother already prepared delicious When we went to home at afternoon.这样可以吗

可以，将句子改为"My mother already prepared delicious When we went home in the afternoon." 可以更好地表达意思，也符合英语语法规则。

My mother already prepared delicious dinner and orange juice to celebrate my birthday When we went to home at afternoon.这样呢可以吗

可以，但是需要将"to"改为"for"。正确的句子应该是："My mother already prepared a delicious dinner and orange juice to celebrate my birthday when we went home in the afternoon."