Помогите 1 задание и второе!

1 b

2 с

3 а

4 a

The case is always investigated

The case was investigated yesterday

The case will be investigated tomorrow

The case is being investigated now

The case was being investigated when I came in

The case has just been investigated

The case had been investigated

The case will have been investigated

The case has been investigating

The case had been investigating

The case will have been investigating