观察下列句子，试着归纳其画线部分所包含的句型结构。

1．I feel very honoured to have been able to take on this role．

______________________

2．Watch any TV report on places where there is a war, and you will see soldiers wearing blue berets．

______________________

3．This makes it easier to communicate and find out about people’s problems．

______________________

4．It is quite horrible to imagine losing everything, including some of your family．

______________________