3. put the verbs in brackets into the present simple or the present continuous tense. 1. let's go out. it (not to rain) now. 2. mary is very good at languages. she (to speak) four languages very well. 3. hurry up! everybody (to wait) for you. 4. you (to listen) to the radio? (to listen) to the radio every day? – no, just occasionally. 6. the river nile (to flow) into the mediterranean. 7. look at the river. it (to flow) very fast today. 8. how is your english? not bad. it (to improve) slowly. 9. the train is never late. it always (to leave) on time. 10. john is very untidy. he always (to leave) his things all over the place.

Below are the sentences with the verbs correctly conjugated in either the present simple or the present continuous tense:

1. Let's go out. It is not raining now.
   (Present continuous is used for an action happening at the moment of speaking).
2. Mary is very good at languages. She speaks four languages very well.
   (Present simple is used for permanent facts or general abilities).
3. Hurry up! Everybody is waiting for you.
   (Present continuous is used for an action currently in progress).
4. Are you listening to the radio?
   (Present continuous is used to ask about an activity happening right now).
5. Do you listen to the radio every day? – No, just occasionally.
   (Present simple is used for habitual actions or routines).
6. The River Nile flows into the Mediterranean.
   (Present simple is used for scientific facts or permanent truths).
7. Look at the river. It is flowing very fast today.
   (Present continuous is used for a temporary situation happening "today").
8. How is your English? Not bad. It is improving slowly.
   (Present continuous is used for changing situations or processes of development).
9. The train is never late. It always leaves on time.
   (Present simple is used for timetables and repeated actions).
10. John is very untidy. He is always leaving his things all over the place.
    (Present continuous with "always" is used to express annoyance or a persistent habit).

Tell me if you would like a deeper breakdown of the grammatical rules used for these specific verb forms.