Thumbing
vi. 翘起拇指请求搭乘（过路汽车）, 示意请求搭便车（thumb的现在分词形式）
🗣️ 情景例句
Just make the few changes I suggested and your letter will be perfect!
只要改动我提到的个别地方，你的信就会很完美了。
Would he have seen you if you hadn't waved to him?
如果你没向他招手他会看见你吗？
The children land on the island.
孩子们登上那个岛。