Question

1. As he was sitting there thinking,he felt a big hand         . (lay)

当他坐在那思考时，他感觉到一只大手放在了他的肩上。

Answer 1

1. laid on his shoulder过去分词短语表状态：动作已完成。注意,lay为及物动词，不可用表主动的现在分词形式。