Tom is under observation. ✬

It was just an observation. ✬

Tom was kept in hospital overnight for observation. ✬

Tom was kept in the hospital overnight for observation. ✬

Can I make one observation? ✬

Will you let me make an observation? ✬

Will you permit me to make an observation? ✬

Could you allow me to make an observation? ✬

Tom is under observation now. ✬