In a type 3 conditional sentence, the tense in the "if" clause is the past perfect, and the tense in the main clause is the perfect conditional or the perfect continuous conditional.
Conditionals are sentences with two different clauses. In a type 2 conditional sentence, the tense in the "if" clause is the simple past, and the tense in the main clause is the present conditional or the present continuous conditional.
Conditionals are sentences with two different clauses. Type 1 conditional sentences are used to talk about real and possible situations. Here we use a simple present tense in the if-clause and will /can / may + infinitive in the result clause.