Jawaban:

a. Judging from her appearance, she has been working very hard lately. (Present Perfect Continuous)

(Dari penampilannya, dia sudah bekerja sangat keras akhir-akhir ini.)

b. By the time we arrived, the police had already been conducting an initial investigation. (Past Perfect)

(Pada saat kami tiba, polisi sudah melakukan investigasi awal.)

c. The police are currently arresting the suspect for the robbery. (Present Progressive)

(Polisi saat ini sedang menangkap tersangka atas kasus perampokan.)

d. By the time of the pretrial hearing, the lawyers will have been preparing their case for weeks. (Future Perfect Progressive)

(Pada saat persidangan pra-persidangan, para pengacara sudah menyiapkan kasus mereka selama berminggu-minggu.)

e. The prosecuting attorney had been working on the case for months before it went to trial. (Past Perfect Progressive)

(Jaksa penuntut sudah bekerja pada kasus tersebut selama berbulan-bulan sebelum diadakan persidangan.)