高考语法填空中非谓语动词应用
1.分析句子结构
确定用非谓语动词
确定（逻辑主语& 语态）
2.判断非谓语动词在句中成份和作用
3.判断 时态
确定恰当非谓语动词形式
3 steps to go
[例1] I got on the bus and found a seat near the back, and then I noticed a man 18   (sit) at the front. （广东卷）[例2] He spit it out, __37___(say) it was awful. （广东卷）
若句中已经有谓语动词，又不是并列谓语时，所给动词就是非谓语动词。
sitting
saying