English - Grammar - Sentence Structure - Compound-complex sentences - Classify the Sentence

4 boxes: SIMPLE, COMPOUND, COMPLEX, COMPOUND-COMPLEX. 16 sentences to classify: (1) 'The cat slept on the mat.' (Simple). (2) 'I was hungry, so I ate.' (Compound). (3) 'When I arrived, the party had started.' (Complex). (4) 'Although it was late, I finished my work, and I went to bed.' (Compound-Com