Lead in:Do you remember this question? (watch) a family of chimps wake up is our first activity of the day.watchingUnit 2 Working the LandGrammar:V-ing 做主语和宾语1.动词-ing 形式的构成: 是在动词末尾加-ing形式构成,因此叫动词的-ing 形式。如:do-doing,help-helping,ask-asking,etc.否定形式:not+-ing 构成2.动词-ing 形式不能单独作谓语如：Ireadingthebook.( 改错)3.动词-ing 形式由动词加-ing 变化而成,它同时具有名词和动词的特征,在句中可以作主语、宾语等。I am reading the book.一作主语. 动名词作主语时，句子有三种形式：1. 动名词直接置于句首主语的位置上。1) 对别人说谎是我们万万不能干的. is something we should never do 2) 学习新单词对我来说非常重要。 is very importan
