Final answer:
In English grammar, a conditional sentence expresses a condition and its consequences. There are several types, such as zero, first, second, third, and mixed conditionals, indicating various degrees of possibility or hypothetical scenarios.
Step-by-step explanation:
In English grammar, a conditional sentence typically refers to a sentence that expresses a hypothesis or condition, real or imagined, and its consequences. The 'special handling note' seems to be a misplaced term in this context as it's not a recognized term in the study of English conditionals.
However, a conditional sentence itself has several types, including zero conditional, first conditional, second conditional, third conditional, and mixed conditionals. These types represent different degrees of possibility or hypothetical situations. For instance, the first conditional is used for real possibilities in the future, while the second conditional expresses unreal or improbable conditions for the present or future. The third conditional deals with past situations that did not happen, and a mixed conditional combines time references for situations that span the past and the present.