1.　　　 Let the students love nature.

5.主语+动词+间接引语+直接引语

4.主语+及物动词+宾语

3.主语+不及物动词

2.主语+动词+宾语+宾语补足语

5.　　　 Danny wanted Jim to open the door.

答案:　 1.主语+系动词+表语

4.　　　 The students are singing English songs.

3.　　　 We arrrived.

2.　　　 Miss Li teaches us English.

1.　　　 The weather becomes cold.