2. Put the verbs in the correct present tense: 1. Friends always ..........(help) us to
..(help) us to express ourselves.
2. They
.........(think) of going to France for a week.
3. Judy is a really caring person. I.... ...(know) her since we met at primary school.
4. I'am sorry that I haven't written back sooner. I ...... (study) for exams since March.
5. Our plane...... ( arrive) early in the morning.​

Certainly! Here are the sentences with the verbs filled in using the correct present tense:

1. Friends always help us to express ourselves.
2. They are thinking of going to France for a week.
3. Judy is a really caring person. I have known her since we met at primary school.
4. I am sorry that I haven't written back sooner. I have been studying for exams since March.
5. Our plane arrives early in the morning.

Now, let's break down why these particular tense forms are used:

1. "help" is in the simple present tense, which is used for habitual or general truths. The statement suggests that friends always perform the action of helping.

2. "are thinking" is in the present continuous tense, indicating an action that is currently happening or planned for the future. Here, it reflects a plan or consideration that is currently in process.

3. "have known" is in the present perfect tense, which is used for actions that started in the past and continue to the present. The speaker has known Judy since they met, and this relationship continues.

4. "have been studying" is in the present perfect continuous tense. This tense emphasizes the duration of an action that began in the past and is still ongoing. The speaker started studying in March and is still doing so.

5. "arrives" is in the simple present tense, commonly used for scheduled events in the future, such as timetables or itineraries. The plane is scheduled to arrive early in the morning.