Hello,
I have problems with "that" when it acts like subordinate conjunction. Are there some "rules" (that?) we can refer to when we want to omit it? I know it can be deleted after "frequent" words such as: know, say, find, feel, seem(?), believe (refference
Grammar Girl : Omitting “That” :: Quick and Dirty Tips )
It seems (that?) it helps if we learn those words which permit omission by heart.
Thanks