一 动 词 不 定 式 ：to + 动词原形1.基本用法：可在句中作主、宾、表、定、状、补。1）作主语To get up early is a good habit.Its so nice to hear your voice.(it 为形式主语)It is important for us to learn English well.Its silly of you to do such a thing.How to improve our English is still a problem.2) 作宾语We all hope to see you.They found it hard to learn Chinese. （it 为形式宾语）I do not know what to do next. （疑问词+ 不定式）He asked me how to improve English.（疑问词 +不定式）3）作表语 一般情况My work is to clean the room every day. H
