а) с глаголом в прошедшем совершенном времени в действительном залоге; Jazz music had gone on from New Orleans to spread around the world, but the early jazz style was no longer popular and had been forgotten. Almost all of them had given up their music and were working at various different kinds of work or just wandering around with little purpose.
б) с глаголом в прошедшем неопределенном времени в страдательном залоге; Later. more of the old musicians were found, old groups were put together again, and with the opening of Preservation Hall, the real old jazz music and those who loved it began to go back to New Orleans.
в) с причастием II. Jazz music had gone on from New Orleans to spread around the world, but the early jazz style was no longer popular and had been forgotten. But tourists, many of them serious music lovers, go there from all over the world and pay one dollar to sit on plain wooden chairs or benches or on the floor, crowded together. Their music is a kind now rarely heard anywhere else - till recently the style had been all but forgotten and so had the musicians. Americans have been given a Iast chance to hear music that soon will never be heard again, played by those who created it- who themselves will soon be gone. Almost all of them had given up their music and were working at various different kinds of work or just wandering around with little purpose.