observe sb to do/doing 区别

observe sb to do/doing 区别 observe sb 关于短语observe sb do sth的一道题目The woman was observe to follow him closely.为什么用的是to follow而不是follow? 造句：hear sb do sth .look at sb do sth.make sb do sth .notice sb do sth .observe sb do sth . 请问：see,watch,notice,hear,feel,observe这些在被动语态里都要还原to可watch 的 固定搭配没有to呀,是watch sb do sth 关于observe something的意思及例句 例句越简单越好 另求observe something与observe sb.do/doing sth.的区别 lead sb.to do follow sb to do listen to sb do cause sb.to do see sb to do ask sb to do permit sb to do hold sb to do ask sb to do help sb.to do get sb to do want sb to do