SHOULD COULD I should eat sensibly all the time. I could eat sensibly all the time. I should be more organized. I could be more organized. I should manage my Chimp better. I could manage my Chimp better. The differences between the two statements are that using the word “should” often evokes a sense of judgment, a command, guilt or a feeling of failure, whereas using the word “could” usually evokes feelings of possibility, hope, an option, a choice, empowerment and potential for change. The equivalent word for “must” is “might.” Try some sentences for yourself with this.