I HELPED SALLY BUY A NEW WATCH是什么时态

I HELPED SALLY BUY A NEW WATCH是什么时态 I helped Sally buy a new watch I helped Sally ___(buy)a new watch. I helped Sally buy a new I helped Bob_(买)a new watch. i( )buy a new watch... I helped Sally ______(win)a new hat Jim helped his mother (buy) a new watch last month.用buy还是to I’ll buy my daughter a new watch. I"ll buy my daughter a new watch.My daughter_ _ _ a new watc I helped Tom bought a new computer. I would like to buy a new watch.（改为否定句） I ____ ____ to buy a