be seen to do附例句seen 是see 的过去时，这里不是seem的误写A bird was seen___

e seen to do 是被看见要做什么
1.I do not care to be seen in his company.
我不愿意让人看见同他在一起.
2.Whether it will do us good remains to be seen.
这对我们是否有好处,还要看一看.
3.He swore to having seen the man do it.
他肯定地说看见这人做过这事.
4.They were afraid to be seen speaking to me.
他们都怕人们看到他们和我讲话.