Are both the following sentences grammatical with 'until'?
1- I was working in the garden for two hours until my father cam from the market.
2- I worked in the garden for two hours until my father cam from the market.
Original Post
Hi, Subhajit—No, only (2) is correct, and the "until"-clause needs to be set off with a comma: "I worked in the garden for two hours, until my father came home from the market." (Notice that "came" also needs to be spelled correctly.) As a general rule, the present progressive doesn't work with "for"-phrases of duration. That is why (1) is incorrect.