Данная фраза переводится, как "Я посвятил много времени изучению". Это прошедшее время, поскольку "learning" - изучение.
Но окончание "ing" ставится, ТОЛЬКО у глаголов. Прошедшее время - past tense/
1.We can woke up very early
2.They can became architects
3.He can became rich
4.She can went on a trip
1. Should you work yesterday?
2. Do you make a report?
3. Could she write a note?
4. Is it a beautiful day?
1 come
2 will send
3 were
4 made
5 has
6 will be
7 takes
8 is
9 was
10 passed
11 are
12 went
13 snowed
14 am, want
15 took
16 does
17 won't rain
I get up at eight o'clock