“Probably” and “possibly” are both adverbs that express likelihood or probability, but they differ in the degree of certainty they convey.

– “Probably” indicates a higher level of likelihood or certainty about something happening. It suggests that there is a strong chance or a high probability of the event occurring. For example, “It will probably rain tomorrow” implies a greater confidence in the prediction.

– On the other hand, “possibly” indicates a lower level of certainty or likelihood. It suggests that something may happen or be true, but there is also a chance that it may not. For instance, “He is possibly going to be late” implies a sense of uncertainty or doubt about the event happening.

In terms of modifying verbs, “probably” strengthens the likelihood of an action or event, while “possibly” introduces an element of uncertainty or doubt. These adverbs play a crucial role in expressing degrees of likelihood or probability in statements, thereby influencing how confident or unsure the speaker is about the information being conveyed.

In summary, “probably” suggests a higher likelihood or probability with more confidence, whereas “possibly” indicates a lower, more uncertain chance of something happening. Both adverbs help to convey different levels of certainty or uncertainty in statements.