1. let's clean up the beach today (rewrite the sentence)
=> I think we
2. Tam went to school late. He stayed up late watching TV (rewrite the sentence)
=> Because Tam
1. let's clean up the beach today (rewrite the sentence) => I think we should clean up the beach today. 2. Tam went to school late. He stayed up late watching TV (rewrite the sentence) => Because Tam stayed up late watching TV, he went to school late.