EF3 sent comb models

Here are six possible solutions.  You may find others.

1.      simple sentence

The hardworking student passed the test and is happy.

2.      compound sentence

The hardworking student passed the test, so she is happy.

3.      compound sentence

The hardworking student passed the test; therefore, she is happy.

4.      complex sentence- adjective clause

The hardworking student who passed the test is happy.

5.      complex sentence- adverb clause

The hardworking student is happy because she passed the test.

6.      complex sentence- noun clause

The hardworking happy student knows that she passed the test.