He is more careful than I。
had been 与过去时相反的虚拟语气.此处主句could have done （相对从句退一步）从句应该是对应的had been.
let sb do more carefuily
want somebody to be more careful about something.
He is more careful than me.
201 浏览 2 回答
229 浏览 8 回答
99 浏览 4 回答
189 浏览 5 回答
349 浏览 4 回答
189 浏览 4 回答
217 浏览 5 回答
158 浏览 9 回答
271 浏览 7 回答
292 浏览 7 回答
278 浏览
127 浏览
322 浏览
292 浏览
劲草黑锅
