tookpictures的过去式怎么写

过去式是took pictures，例如：

1、I walked along the stone streets， took pictures of the European-style buildings， and learned some stories there.我走在石街上，拍下了欧式建筑的照片，并在那里听说了一些故事。

2、We learned about how the plane was invented and took many pictures there.我们学习了飞机发明的渊源，还在那里拍了许多照片。

3、We had a five-day trip and took many pictures.我们旅行了五天，拍了许多照片。