Yes, there is a assignment error you are not taken care off.
if (TextField1.rawValue="We") -------> here you are actually assigning the value "We" to text field
TextField2.rawValue = "are";
else if (TextField1.rawValue="I")
TextField2.rawValue = "am";
use this code, it works
if (TextField1.rawValue == "We") -------> use comparision operator NOT assignment operator,
TextField2.rawValue = "are";
else if (TextField1.rawValue == "I")
TextField2.rawValue = "am";
try this.
thanks,
Rajesh