EF2/3 sentence combining

1.     The girl won the race and is happy. SIMPLE

The happy girl won the race. SIMPLE

The girl won the race, so she is happy. COMPOUND

The girl won the race; therefore,  she is happy. COMPOUND

The girl is happy because she won the race. COMPLEX- ADVERB CLAUSE

The girl who won the race is happy. COMPLEX- ADJECTIVE CLAUSE

The happy girl knew that she won the race. COMPLEX- NOUN CLAUSE

2.     The student is from China and sits next to me.

The student who sits next to me is from China.

The student is from China that sits next to me. MISPLACED MODIFIER

I gave a table to my sister with three legs. MISPLACED MODIFIER

I gave a table with three legs to my sister.

The man saw a cat who was riding a bicycle.

The man who was riding a bicycle saw a cat.

3.     The friendly taxi driver took me to the airport.

The taxi driver took me to the airport because he was friendly. LOGIC?

4.     I am running late, so I have to skip breakfast.

I have to skip breakfast because/ since I am running late.