Verb forms: choose the time and the viewpoint
English verb forms present events and states from different viewpoints. A time word helps, but meaning and context decide the complete form.
Use the pattern in context
Use a routine as a baseline: I work here. Contrast an activity in progress: I am working on the report. A finished past date supports I worked yesterday. A present connection can support I have worked here since 2020. Future reference can use will, going to or an arranged present continuous. Learn each form with a situation, then compare two meanings.
Examples to compare
- Routine: She takes the bus every day.
- Now: She is waiting at the stop.
- Finished past: She took the bus yesterday.
Limits and useful distinctions
There is no useful rule that every English sentence must contain an explicit time word. Tense and aspect do different jobs, and dialects sometimes prefer different recent-past forms. The lesson drills provide explicit constructions so a plausible alternative meaning is not marked wrong.
Check your understanding
Which form matches a finished event yesterday: visited or have visited?
Reveal the answer and reason
Visited, in a simple sentence with yesterday.
The explicit finished past time supports the past simple. Read the guide
Try a new example with the same purpose. Check that your version keeps the intended meaning and grammatical pattern.
One task, six different meanings
These sentences all use prepare. Choose the meaning first, then the verb form. A time expression helps locate an event, but context still matters.
| Meaning | Original example | Compare |
|---|---|---|
| A repeated routine | I prepare the room every Monday. | Present simple |
| An activity happening now | I am preparing the room. Please wait outside. | Present continuous |
| A finished past event | I prepared the room yesterday. | Past simple |
| A result relevant now | I have prepared the room, so we can begin. | Present perfect |
| An existing future intention | I am going to prepare the room after lunch. | Future forms |
| An arranged future activity | I am preparing the room with Sam at two tomorrow. | Future arrangements |
Why two answers can both be grammatical
I work here presents a situation as a fact; I am working here this month presents it as a temporary current activity. Neither form is a universal replacement for the other. This overview introduces the contrasts; the linked lessons explain each construction and its limits.
Check: a finished event yesterday, or a result now?
Use We sent the invitations yesterday for the explicitly finished past event. Use We have sent the invitations, so everyone has the details to connect the completed action to the present situation. The examples illustrate these contexts, not every possible use.