Are these sentences grammatically correct?

[eggcracker]

I made some sentences with I learned new. Please check whether these sentences are correct below.

1 He has been too sheltered that he can't do anything by himself.

2 He has been too sheltered that can't do anything by himself.

3 The black colors on the edge of cape is in contrast to the yellow colors on the cape.

 

[SoothingDave]

1. It seems off to me with "too." I would say he has been so sheltered...
2. No, you need the second "he."
3. Your verb doesn't match. "Colors are," not "colors is."

 

[emsr2d2]

And you need "the" before "cape" both times in #3.