1、bob is very busy and he has much schoolwork （to do）动词不定式作后置定语
2、mr、wang wae the first person（to speak） at the meeting.（同1）
3、Jenny started （to collect）stamps last year.动词不定式作宾语
4、how much time do you usually spend （reading ）english everyday .（固定用法spend ...doing sth )
5jack started the collection of coins five years ago.（该同义句）
Jack( collected the ) coins five years ago