plunge
感官动词 see, watch, observe, notice, look at, hear, listen to, smell, taste, feel + do表示动作的完整性,真实性；+doing 表示动作的连续性,进行性
I saw him work in the garden yesterday.
昨天我看见他在花园里干活了.(强调"我看见了"这个事实)
I saw him working in the garden yesterday.（强调"我见他正干活"这个动作）
昨天我见他正在花园里干活.
那哥们是先看到车子进去才打的电话...