and / but / so
1- I'm so hungry I'm so tired.
2- He's an English teacher, he doesn't teach science.
3-I am not wearing a tie I'm wearing a suit.
4- It's so cold I am not going to work.
5- They are very young students they are smart.
6- She's wearing a scarf a jacket.
7- The weather is so cold windy.
8- It's sunny It's cold.
9- It isn't raining I will go for a walk in the park.
10- I haven't finished my homework, I have to stay up late.
11- The teacher is talking we are not listening.
12- I was so tired, I went to bed early.