我的祖父过去总是从他的门廊转身挥手告别。

My grandfather ___would always turn and wave goodbye from his porch.

每天早上，我们过去都一起步行上学。

Every morning, we ___would walk to school together.

当我还是个孩子的时候，我常常在后院花上好几个小时搭建堡垒。

When I was a kid, I ___would spend hours building forts in the backyard.