表示“發(fā)生、傳播”意義的動詞,如happen,take place,break out,spread等,常用主動形式表示被動意義.如：
The news spread in a small village.
消息在一個小村莊傳開了.
但是spread確實又有被動的時候,強調(diào)由誰傳播的時候用
比如
It spreads easily through direct contact among animals,it is also spread by people on clothing and shoes.