Final answer:
The sentences in the question use both the present simple and present continuous tenses. The present simple tense is used to talk about things that are always true, habits, general truths, and scheduled events. The present continuous tense is used to talk about actions happening at the moment, temporary situations, and future plans.
Step-by-step explanation:
The sentences in the question use both the present simple and present continuous tenses. The present simple tense is used to talk about things that are always true, habits, general truths, and scheduled events. The present continuous tense is used to talk about actions happening at the moment, temporary situations, and future plans. Let's analyze each sentence:
- She is staying in Paris for the next few weeks. (Present continuous - temporary situation)
- Jean stays with us quite often. The children love having her here. (Present simple - habit)
- They always complain about their health. (Present simple - habit)
- I doubt whether I'll get another chance to retake the exam. (Present simple - general truth)
- I have to go to bed early tonight because my train leaves at 6 AM tomorrow morning. (Present simple - scheduled event)
- The Polish economy is constantly developing. (Present continuous - temporary situation)
- The new treatment for influenza is amazing. (Present simple - general truth)
- A guy doesn't appear to work, walks into a bar, and starts talking... (Present simple - general truth)
- If she believes me, we will go to that restaurant. (Present simple - general truth)
- It is getting more and more dangerous. (Present continuous - temporary situation)
- Peter is thinking of buying a new car. (Present continuous - temporary situation)
- Jim is being very mean today. (Present continuous - temporary situation)
- She is flying to London next week. (Present continuous - future plan)
- They are seeing their doctor next month. (Present continuous - future plan)
- He always forgets his duties. (Present simple - habit)
- I am going to the mountains this weekend. (Present continuous - future plan)
- Are you having a good time? Yes, I'm really enjoying this. (Present continuous - action happening at the moment)
- Tom is retiring in two years' time. (Present continuous - future plan)
- Your trouble is you think too much. (Present simple - habit)
- It rains here a lot at this time of year. (Present simple - general truth)
- The performance starts at 7 tomorrow. (Present simple - scheduled event)