1.planted 看到last Saturday用一般过去时
2.watched TV as usual
昨天发生的事用一般过去时,watch+ed,as usual 像往常一样
3.returned the book to
reterned sth.to sb.=give sth.back to sb.
give用的是一般过去时gave,所以retern+ed
4.They kept on reading English for two hours.
固定句型 keep on doing
5.Do you know the robber's name?名词所有格形式
6.kinds
固定词组 kinds of 许多种类