I took GCSE Latin in 1989, after 5 years of studying it (starting at age 11).
You don't say how long you've been learning it, and I obviously have no idea of how it is taught these days; but when I did it, we covered all of the indicative mood in the first two years, and then the subjunctive and participles etc were covered in years 3 and 4.
So to some extent, I'd say (perhaps not very helpfully) that I'd expect you to know this before entering year 11.
Of course, if you've only been studying Latin for 2 years at this point, then it's rather different.
Things are not as daunting as they might appear, though; the 1st and 2nd conjugations are rather similar to each other; as are the 3rd and 4th. The perfect, future perfect, and pluperfect tenses are all formed in the same way; you just need to know the principal parts of the verb to do this. Please tell me you do actually learn the 4 principal parts for each verb (e.g. amo, amare,amavi, amatum (to love))