One is ‘jumps’ and the other is ‘shouted’. Both of the verbs are of different tense forms. ‘jumps’ is the Simple present tense, while ‘shouted’ is simple past tense. Hence, this sentence is an example of an inappropriate shift in verb tense.

Do not switch from one tense to another unless the timing of an action demands that you do. Keep verb tense consistent in sentences, paragraphs, and essays.

The bottom line is this: there is no restriction on what tenses we can use and mix within a sentence, as long as they are appropriate for the context. Here, we have present perfect tense, simple past tense and simple future tense all in the same sentence.

Using the past simple tense If you’re talking about something that happened in the past, then this is the tense you’re most likely to use. It’s used when something took place in the past and stopped at a clear point. For example: “The car broke down after they crossed the bridge.”

Definition: Tense shifts happen when writers accidentally switch from one tense to another in the same sentence, paragraph, story, or essay. Sometimes a shift is necessary, but accidental shifts happens when writers become distracted.

Inappropriate shift. An inappropriate shift or inconsistency in the verb of a sentence confuses the reader. Shifts in a verb mood can make reading difficult and obscure the sentence’s meaning. To correct the shift, both clauses in the sentence should be in the same mood.

When a sentence has two or more verbs, both verbs should stay in the same voice. Inappropriate shifts in verb voice from active to passive or vice versa can really be confusing to the reader. ‘ Now both verbs are in active voice and the sentence is written clearly. …

As a general rule, verb tenses within a sentence or a paragraph should be consistent. A shift in tense without reason distorts the sequence of events being described and will confuse your reader.

The word derives from the Latin plus quam perfectum, “more than perfect”. In English grammar, the pluperfect (e.g. “had written”) is now usually called the past perfect, since it combines past tense with perfect aspect. (The same term is sometimes used in relation to the grammar of other languages.)

The past perfect is not necessary if we are not ‘going back’ to the earlier past, and simply moving from one event to another. If the sequence is clear, the past perfect is not needed. The past perfect is optional only when talking about an action at a specific time. This is confusing.

You use past tense for something that occurred in a known time in the past, which is not the case here. The second one, with “have had,” which is correct, is in the present perfect tense, which describes an event that has occurred in an undefined time in the past and is still relevant now.