She was alone implies simply the absence of company, she was lonely stresses the feeling of melancholy and desolation resulting from being alone. A single tree on the plain states plainly that there is (was) only one tree, not two or more. A lonely tree on the plain gives essentially the same information, that there was one tree and no more, but also creates an emotionally coloured picture.
In the group to tremble — to shiver — to shudder — to shake, the verb to shudder is frequently associated with the emotion of fear, horror or disgust, etc. (e. g. to shudder with horror) and therefore can be said to have an emotive connotation in addition to the two others (see the scheme in Ch. 7, p. 136).
One should be warned against confusing words with emotive connotations and words with emotive denotative meanings, e. g. to love — to admire — to adore — to worship; angry — furious — enraged; fear — terror — horror. In the latter, emotion is expressed by the leading semantic component whereas in the former it is an accompanying, subsidiary characteristic.
IV. The evaluative connotation conveys the speaker's attitude towards the referent, labelling it as good or bad. So in the group well-known — famous — notorious — celebrated, the adjective notorious bears a negative evaluative connotation and celebrated a positive one. Cf.: a notorious murderer, robber, swindler, coward, lady-killer, flirt, but a celebrated scholar, artist, singer, man-of-letters.
In the group to produce — to create — to manufacture — to fabricate, the verb to create characterises the process as inspired and noble. To manufacture means "to produce in a mechanical way without inspiration or originality". So, to create can be said to have a positive evaluative connotation, and to manufacture a negative one.