
Regular verb: observe - observed - observed
Simple form | V-ing form | 
| I'll observe you'll observe she'll observe we'll observe you'll observe they'll observe  | I'll be observing you'll be observing she'll be observing we'll be observing you'll be observing they'll be observing  | 
Perfect | V-ing perfect | 
| I'll have observed you'll have observed she'll have observed we'll have observed you'll have observed they'll have observed  | I'll have been observing you'll have been observing she'll have been observing we'll have been observing you'll have been observing they'll have been observing  | 
Simple form | V-ing form | 
| I shan't observe you shan't observe she shan't observe we shan't observe you shan't observe they shan't observe  | I shan't be observing you shan't be observing she shan't be observing we shan't be observing you shan't be observing they shan't be observing  | 
Perfect | V-ing perfect | 
| I shan't have observed you shan't have observed she shan't have observed we shan't have observed you shan't have observed they shan't have observed  | I shan't have been observing you shan't have been observing she shan't have been observing we shan't have been observing you shan't have been observing they shan't have been observing  | 
Simple form | V-ing form | 
| shall I observe? shall you observe? shall she observe? shall we observe? shall you observe? shall they observe?  | shall I be observing? shall you be observing? shall she be observing? shall we be observing? shall you be observing? shall they be observing?  | 
Perfect | V-ing perfect | 
| shall I have observed? shall you have observed? shall she have observed? shall we have observed? shall you have observed? shall they have observed?  | shall I have been observing? shall you have been observing? shall she have been observing? shall we have been observing? shall you have been observing? shall they have been observing?  | 
Simple form | V-ing form | 
| shan't I observe? shan't you observe? shan't she observe? shan't we observe? shan't you observe? shan't they observe?  | shan't I be observing? shan't you be observing? shan't she be observing? shan't we be observing? shan't you be observing? shan't they be observing?  | 
Perfect | V-ing perfect | 
| shan't I have observed? shan't you have observed? shan't she have observed? shan't we have observed? shan't you have observed? shan't they have observed?  | shan't I have been observing? shan't you have been observing? shan't she have been observing? shan't we have been observing? shan't you have been observing? shan't they have been observing?  |