What is the disjunction of a contingent form and a contradiction? What is a conditional with a contradiction for an antecedent and a contingent form for a consequent? Any help you can give me is greatly appreciated!!!! Thanks!?
You should get helped by few good sources.
I have been using the mentioned sources over 20 years.
One is Barron's and other is Cliffs' TOEFL suggestion books for grammar section.
Your question type says you are a non native one. If it is ok, take them first then go for the British system conditional sentences, like 2nd form/third forms whether you need further to understand depending on your situation.
I notice my professional students can easily understand the explanations of the USA conditional structure than the British structure instantly.
Hope it will work.