1、 She comes to visit us sometimes.

她有时来访问我们。

2、 I sometimes think that it is a great mistake.

我有时想这是一个大错。

3、 It is sometimes warm and sometimes cold.

天时热时冷。

4、 Buttons are sometimes made of bone.

钮扣有时是用骨头做的。

5、 Sometimes I pay， sometimes he pays it seems to average out in the end.

有时我付钱，有时他付钱，到头来似乎两相抵销。