1.
-ing: sleeping,walking,laughing,studying,playing
-ie ->y + -ing:dying
-e -> -ing: dancing,writing
-double consonant + -ing:stipping, running,swimming,shopping
2.
1.is playing
2.is she doing,is watching
3.they going,are you going
4.isn't working, is he looking
3.
1.I'm not studying at the moment.
2.I'm not thinking now.
3.I'm not doing going at school these days.
4.I'm not sleeping tonight.