Question

He used to ( ) (come ) to school at 7.00 in the morning

Answer 1

很高兴为您解答：

come

be used to doing 表示“习惯于”，后留跟名词或动名词，be也可用get等代替。

I am used to shopping alone. 我习惯于一个人购物。

She is used to getting up early. 她习惯于早起。

used to do 表示过去经常发生的事，强调现在已经不存在的习惯。

e.g. I used to get up early when I worked in the factory.

在厂里上班的时候，我通常起得很早。（现在用不着早起了）

He didn’t use to drink 他过去不喝酒的。

希望我的回答对您有帮助，祝您学习进步，工作顺心。^_^

Answer 2

完整的句子是：
He used to come to school at 7.00 in the morning.
意思是：
他曾经在早晨7点到校。

Answer 3

填原形 come
固定用法 used to do sth过去常常做某事

He used to come to school at 7 o'clock in the morning.