Wrong: We have had a grand time this afternoon.
Right: We have had a very pleasant time this afternoon.

Guess. Do not use guess in the sense of think or suppose.

Wrong: I guess the trains are late to-day.
Right: I suppose the trains are late to-day.
Right: Can you guess the riddle?

Had ought. Do not use had with ought. See §54.

Hardly. Do not use hardly after a negative. See §46.

Wrong: I can not hardly believe that.
Right: I can hardly believe that.

Have. Do not use have after had.

Wrong: If I had have been able to go.
Right: If I had been able to go.

Heighth. Do not use heighth for height.

Hung. Do not confuse hung and hanged. Hanged is the proper word to use in reference to executions.