It is the biggest change that has occurred in the pronunciation of the English language in the fifteenth century. This change mainly concerned the pronunciation of long vowels and is the direct cause of the current discrepancy between the spelling and pronunciation of English.
The pusle of morning is when something in your life gooes wrong and you morn over it for a long time
A prepositional phrase is such a phrase which begins with a preposition (on, under, over, etc) and ends with a noun, pronoun, gerund, phrase etc.
So here, the correct sentence will be "On the stage the members of the orchestra began to tune their instruments".
