以下几道英语不定式各在句子中充当什么成分？·····分析一下

Question

1.the best way 【to improve your english】 is【 to join an english club】
2.if you don't know 【to spell new words】.look them up in a dictionary
3.I started 【to watch english-language TV】
4.I decided 【to take lots of grammar notes】 in every class
5.I don't have a partner 【to practice english with】(思考一下，with能省略么)
6.It wasn‘t easy for me 【to understand the teacher 】when she talked to the class

急求啦······亲们~~~~~~~~

Answer 1

1.the best way 【to improve your english】 is【 to join an english club】
定语 表语
2.if you don't know 【to spell new words】.look them up in a dictionary
宾语
3.I started 【to watch english-language TV】
宾语
4.I decided 【to take lots of grammar notes】 in every class
宾语
5.I don't have a partner 【to practice english with】(思考一下，with能省略么)
定语 with不能省略， practice english with sb
6.It wasn‘t easy for me 【to understand the teacher 】when she talked to the class
主语 句首it是形式主语