Rewrite the sentences

GIẢI RÕ NHÉ!!
change these sentences into reported speech
1. i have been learning English for 10 years
=> he said that..
2. there are many grey clouds. It is going to rain
=> My friends said..
3. the lesson will star in 30 minutes
=> the teacher..
4, you have to behave politely if you want to stay here
=> she told me that..
(GIẢI THÍCH RÕ GIÚP MÌNH NHÉ) WILL BE TICK ĐIỂM :V