The objective of this worksheet is to reinforce students' understanding of the present perfect tense in English. By incorporating common time expressions like since, for, just, already, never, ever, yet, and still, students will practice using these words correctly in sentences to indicate the timing of actions.

Content Overview:
This worksheet focuses on the present perfect tense and the appropriate use of time expressions to convey specific meanings. Students will work on forming sentences using the present perfect tense and inserting the relevant time expressions in the correct positions. The content covers a range of scenarios and actions to provide a comprehensive practice of the present perfect tense with various time markers.

Language and Educational Level Context:
Designed for students learning English as a Second Language (ESL), this worksheet caters to learners who are already familiar with basic grammar concepts and are progressing towards more advanced sentence structures. The use of time expressions adds complexity to their understanding of the present perfect tense, allowing them to communicate more precisely about past actions and experiences.

Subject Relevance:
Integrated into the ESL curriculum, this worksheet aligns with the broader goal of enhancing students' proficiency in using English grammar accurately and effectively. By focusing on the present perfect tense and time expressions, students develop the skills necessary to convey actions and events in relation to specific points in time, enriching their language abilities and communication skills.

Instructions:
The instructions text provided in the worksheet serves as a guide for students to practice using the present perfect tense with the designated time expressions. For example, the sentence "We have lived in Tokyo since 1994." prompts students to apply the time expression "since" to indicate the duration of time lived in a particular place. Similarly, "Have you finished your homework yet?" encourages students to use "yet" to inquire about the completion of an action in the present perfect tense. By following these instructions, students engage with the content in a structured manner, reinforcing their grasp of the present perfect tense and associated time markers.