“Apparently” and “seemingly” are adverbs that are often used interchangeably, but they do carry subtle differences in their meanings:

1. “Apparently” is used to indicate that something is seemingly true based on the information or evidence available. It implies that the speaker is making a statement based on what appears to be the case, although there may be room for doubt or further confirmation.

2. On the other hand, “seemingly” suggests that something gives the impression of being true or real, but there may be an element of uncertainty or doubt about its accuracy. It acknowledges that what is perceived may not necessarily reflect the true nature of the situation.

In terms of how these adverbs modify verbs to show uncertainty or observation, “apparently” often indicates a higher level of confidence in the statement being made, whereas “seemingly” introduces an element of hesitation or caution regarding the accuracy of the observation or perception.

Please let me know if you need additional clarification or examples.