Saying "I suppose"

I tried looking up the verb "to suppose"... but I'm not so sure if I got it right..

みうける ？

I'm working on things I can say on a normal basis when the situation calls for it... Would it be considered any bit normal to just mutter

みうけります Ｏｒ みうける

to just mean "I suppose so" in response to what someone says..

And also...

Does it mean "That's unfortunate/That's a shame" to say

ざんねんだね ？

1) みうける becomes みうけます in formal form.

2) I don't think it means what you think it means:
goo辞書 - 国語・英語・四字熟語・中国語のオンライン辞書

EXCEED和英辞典 said:

みうける 見受ける

《見かける》(happen to) see.
・お見受けしたところ… When I first saw you, you looked….

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3) To say "I suppose so" you'd probably say だろうな, でしょうね, かもしれない, かもしれません, etc.

4) Yes (referring to "that's unfortunate/that's a shame.")

Ｏｈ ｏｋａｙ， Ｉ ｕｓｅｄ ｔｈｅ ｔｈｉｎｇ ｏｎ ｙｏｕｒ ｓｉｇｎａｔｕｒｅ ｔｏ ｌｏｏ ｋ ｉｔ ｕｐ ａｎｄ ｔｈａｔ'ｓ ｗｈａｔ Ｉ ｇｏｔ．