when the sky becomes covered with clouds
当天空被云覆盖时 (dāng tiānkōng bèi yún fùgài shí)
"The sky clouded over, and we knew it was going to rain soon."
"天空被云覆盖，我们知道很快会下雨。" (Tiānkōng **bèi yún fùgài**, wǒmen zhīdào hěn kuài huì xiàyǔ.)
to exaggerate or emphasize something
to decide on something after considering different options
to think about something that happened in the past
to seem or appear to be sincere and truthful
to formally accept something and thank the giver
to introduce or prepare the way for something
