找出下列句子中的合成词,并写出其合成方式
1、Johnputonhiscoatandwentdownstairaquickly.
2、Mymumasksmetufinishmyhomeworkafterschool.
3、Beijingisworld-famousbecauseoftheGreatWall.
4、Iwouldliketogotosomewherewarmtoliveinwinter.