他做手势要我安静.He signed to me to be quiet.警察做手势叫他们停住.The policeman signed ( for ) them to stop.我们正横穿马路时, 警察做手势叫我们停住.While we were crossing the street, the policeman signed for us to stop....

“做手势”的英语可以翻译为：to gesture，to gesticulate...