for + a period of time:
for six years, for ten months, for 5 minutes.
since + a point in time:
since 1999, since 6:00am, since yesterday.
Time expressions used for past perfect tense include "before," "after," "by the time," "already," "just," "until," and "never before." These time expressions help to establish the sequence of events and indicate that an action was completed before another action or a specific point in the past.
Some time expressions that can be used with the past perfect tense include "before," "by the time," "already," and "had never." These expressions help establish the sequencing of events in the past and indicate that one action was completed before another action occurred.
Present tense,present perfect tense,future tense,future perfect tense,past tense,past perfect tense
the will in your sentence is present tense, so it is present tense
I/We/You/They have mistakenHe/She/It has mistaken
Time expressions used for past perfect tense include "before," "after," "by the time," "already," "just," "until," and "never before." These time expressions help to establish the sequence of events and indicate that an action was completed before another action or a specific point in the past.
Some time expressions that can be used with the past perfect tense include "before," "by the time," "already," and "had never." These expressions help establish the sequencing of events in the past and indicate that one action was completed before another action occurred.
Present tense,present perfect tense,future tense,future perfect tense,past tense,past perfect tense
the will in your sentence is present tense, so it is present tense
I/We/You/They have mistakenHe/She/It has mistaken
The difference in meaning is that the action stated by a present perfect tense may have been completed in the last second of time before the present, while the past perfect implies completion at a substantially earlier time. The formal difference is that the present perfect is formed from the present tense of "have", used as an auxiliary verb, combined with the past participle of the principal verb. For the past perfect tense, the past tense of "have" as the auxiliary verb is combined with the past participle of the principal verb.
it's present tense actually
A verb form indicating that an action or state has been completed at the present time, in the past, or will be completed in the future. Past Perfect Tense: I had sung Present Perfect Tense: I have sung Future Perfect Tense: I will have sung
The present perfect tense of "bend" is "have bent" or "has bent". This tense is used to indicate that the action of bending has been completed at some point in the past but the specific time is not specified.
"Has" means something happened before the current time, ("is" is present) so it's past tense.
The present perfect tense is used to describe an action that has been completed recently or at an unspecified time in the past that has a connection to the present. It is formed by combining "have" or "has" with the past participle of the verb. For example, "I have finished my homework."
The present perfect tense is used to indicate an action that happened at an unspecified time before now. It is formed by using the auxiliary verb "have" or "has" followed by the past participle of the main verb. This tense is often used when there is a connection to the present moment or when the exact time of the action is not important.