Much of the form was not applicable to me.
表格中很多部分不适用于我。
Give details of children where applicable.
如有子女请提供详情。
What is a reasonable standard for one family is not applicable for another
对一个家庭合理的.标准并不适用于另一个家庭。
Read the text through and mark off the sections you find particularly applicable.
The section of the form is not applicable in your case.
表格这一部分不适合你的情况。