He is facing multiple problems.

I forgot my mobile phone charger.

We are planning to expand our business.

He drew a dodecagon shape.

He was drawing an icosagon shape.

There are many beautiful shrines and temples in Japan.

Kaku is my best friend.

He is proficient in calculating quadrature in astronomy.

He is struggling to understand the ablative case in Latin.

The sum of one angle of this triangle and its complementary angle is 90 degrees.