Existence.... keberadaan 'the being [in,at]', eksistensi
Existing..... yang ada (lit.: 'which be, which exist']
Life......... kehidupan (hidup 'live [verb]')
Being [noun]. makhluk (also 'creature')
Being [verb]. <may be omitted
                (1) the person, being in charge, was held responsible
                _orang itu, karena berwenang, dianggap bertanggungjawab_
                 lit: person that, because have-authority, be-considered
                      have-responsibility

                sedang (analytical formative of the durative)
                (2) the person being in charge will be held responsible
                _orang yang sedang berwenang akan dianggap bertanggungjawab_
                lit: person which DURATIVE have-authority FUTURE be-held
                     have-responsibility

                yang sedang 'which is [currently] ....'
                (3) the person being held responsible is innocent
                _orang yang sedang dianggap bertanggungjawab tidak bersalah_
                lit: person which DURATIVE be-held have-responsibility not
                     have-fault.

 I was....... 0 / I was sick _saya sakit_ lit: I sick
                 / I was a student _saya mahasiswa_ lit: I student
               (Indonesian does not indicate tense, so the same
                could refer to the present, past, or future, unless
                clear form the context or through use of adverbs,
                or auxiliaries)
 He was...... 0 (ditto)
 They were... 0 (ditto)

 I am........ (4) I am sick _saya sedang sakit_ lit: I DURATIVE sick
               (5) I am a student _saya mahasiswa_ lit: I student
 You are..... sedang / 0  (replace saya with kamu in (4) and (5))
 He is....... sedang / 0  (replace saya with dia in (4) and (5))
 They are.... sedang / 0  (replace saya with mereka in (4) and (5))

 I will be... (6) I will be sick _saya akan sakit_ lit: I FUTURE sick
               (7) I will be a student _saya akan mahasiswa_
                   lit: I FUTURE student
 He will be.. (replace saya with dia in (6) and (7))
 They will be (replace saya with mereka in (6) and (7))

 There was... ada
               (8) ada buku di atas meja 'there is a book on the table'
                   lit: be book aop table
               (9) tadi ada buku di atas meja 'there was a b. on the t.'
                   lit: just-now be book aop table
              (10) pernah ada buku di atas meja 'there was a b. on the t.'
                   lit: once-upon-a-time be book aop tabvle

 There will be. akan ada
 It existed.... itu pernah ada

 The girl is a student
  _Gadis itu mahasiswi_ lit: girl that female-student

 The boy is being kind
  _Anak lelaki itu sedang baik hati_
  lit: child male that DURATIVE good heart

 The building has existed for ten years
  _Gedung itu telah [ada] se-lama sepuluh tahun_
  lit: building that PERFECTIVE [be] as-long ten year

 The girl is running quickly
  _Gadis itu sedang lari cepat_
  lit: girl that DURATIVE run fast

 The boy will be handsome
  _Anak lelaki itu akan rupawan_
  lit: child male that FUTURE handsome

 The man was a doctor
  _Orang itu dokter_
  lit: person that doctor

 I believe in the existence of atoms
  _Saya percaya akan [ada]-nya atom_
  lit: I believe with-regard-to [be] its atom
   (NB the existential verb here is in a form resembling that of
    the English gerund, and the enclitic -nya 'its' is functioning
    here as possessive copula, i.e. what is said literally is:
    'I believe in the to-be of atoms')

 Life exists on earth
  _Di bumi [ada] kehidupan_ lit: at earth [be] life
  _[Ada] kehidupan di bumi_ lit: [be] life at earth

 I like being a student
  _Saya senang [menjadi] mahasiswa_
  lit. I like [become] student

 I enjoy living my life
  _Saya menikmati kehidupan yang saya tempuh ini_
  lit: I enjoy-APPLICATIVE life which I lay-back/go-through this

  _Saya senang dengan kehidupan yang saya alami ini_
  lit: I be-happy with life which I experince this

 I love him/her with my whole 'Being.'
  _Saya mencintai-nya dengan segenap kehadiran-ku_
  lit. I love-APPLICATIVE him/her/it with entire presence my

  _Saya mencintai-nya dengan segenap jiwa raga-ku_
  lit. I love-APPLICATIVE him/her/it with entire soul body my
  (i.e. '... with all me body and soul')

Hope that's any help. The situation in Indonesian with regard to expression of existence and being is somewhat complicated. Basically, the use of a copula is not necessary, and various 'artificial' means
are implemented when one wishes to explicitly do so. There is also
another feature that is not reflected above, and that is the negative copula of being: _bukan_ 'be not'. (saya mahasiswa_ 'I am a student', saya bukan mahasiswa_ 'I am not a student_)

But it does not negate the durative/continuous, for which one uses the normal negation _tidak_ 'no, not' (saya sakit_ 'I am sick'
saya tidak sakit_ 'I am not sick')

Wish you success with your project,

Salam,  Warun Mahdi