In Chinese, there are "a lot" of ways to say "a lot." “有的是” (yǒudeshì) is one of those ways. However, we need to be very clear: "有的是" is not the same as "有的+是". Unfortunately, these two phrases are extremely close, but their meanings are not the same at all! "有的是" indicates that the amount or quantity of something is very large, and it can sometimes indicate a mood of exaggeration.
Subj. + 有的是 + Noun
You can also put the noun at the beginning of the sentence, and put "有的是" at the end, like so:
Noun + Subj. + 有的是 。
It's important to note that "有的是" can not be negated. If you want to say the negative statement, you'll have to say "没有很多."
NEEDS SOURCES