T5: Present/Past Participle after "be" and Base Form Verbs after Modals

Present/Past Participle after "be" 

1. She was studying the textbooks all night long
2. The pie was cut into six equal pieces
3. Today the teacher is allowing the students to leave class a few minutes early
4. The class is taught every other semester
5. Tom is bringing some drinks to the party
6. The sick child was taken to see a doctor
7. The children are swimming in the backyard pool
8. The teacher is preparing a difficult exam for the students
9. Dinner is served from 6:00 to 8:00
10. She is smelling blooming flowers
11. Elizabeth was watching TV when the earthquake happened
12. Irene may be helping her mother in the kitchen now
13. They must have visited their sick friend
14. Samuel has finished his study at a university
15. She might have got an accident when tiding her motorbike so fast

Base Form Verbs after Modals

1. you should try to respond politely
2. everyone must leave the room immediately
3. i could sit on the beach for hours
4. she will ask you may difficult questions
5. you can look at the book, but you cannot borror it
6. he may lie to you because he is not very truthful
7. he knew that he would forget the phone number
8. the weatherman said thet it might snow tonight
9. perhaps we could buy a new car this year
10. this course will satisfy the graduation requirement
11. you must not walk on the grass
12. they had to sell their house
13. we thought he might sell the house
14. i think the bill could be expensive
15. he may be wrong, you know

sumber:

http://www.juraganles.com/2016/06/pembahasan-present-participle-past-participle-dan-fungsinya.html

http://www.toeflskill.com/2011/05/problem-with-present-participle-or.html

https://dictionary.cambridge.org/grammar/british-grammar/modals-and-modality/modality-forms

http://www.grammar.cl/english/modal-verbs.htm

http://www.toeflskill.com/2011/06/problems-with-modals-skill-18.html