Here’s my son, sir, a poor boy— GOBBO This is my son, sir. He’s a poor boy— LAUNCELOT Not a poor boy, sir, but the rich Jew’s man that would, sir, as my father shall specify— LAUNCELOT Not a poor boy, but the rich Jew’s servant, who wants, as my father will explain— GOBBO He hath a great infection, sir, as one would say, to serve— GOBBO He wants very much, sir, as one might say, to work for— LAUNCELOT Indeed the short and the long is, I serve the Jew and have a desire, as my father shall specify—
There is a repetition of the --, to show their serious urgency to spread the message that Launcelot wants to work for Bassanio