だけしか~ない => only N3
~だにしない => Even; not even ~ N1
Emphasize the negative meaning
ないかしら => I wonder (feminine) N4
Aspiration
どうも ... そうだ/ ようだ/ らしい => It seems, probably N3
Speculation
まだV-られない => Not yet ~ N4
Ability
しかしながら => however, nevertheless N2
Things do not match the prediction
…くらいの…しか…ない => Only… at low level N2
Limit, limit
なければならない/なくてはならない/なければいけない/なくてはいけない/なければだめ/なくてはだめ => must N5
くらいだ/ぐらいだ => Around/about N5
Amount
ぐらいならむしろ => If...then it would be better... N2
Cause, reason
らしい => It looks like N3
Situation
くらいなら/ぐらいなら => rather than (do …)​ N1