present tense (active or passive)

common verbs:

• illustrate

• show

• present

• give

• summarise

Figure 1 illustrates the variations of the temperature over time 

Figure 3 shows the experimental procedure 

The results are shown in figure 3

Figure 1 above pictures the various levels of networking

The material compositions of the components are given in figure 6 

simple past (active or passive)

The study showed that a number of the samples proved too viscous for use.

The second model gave a better fit

Considerable changes were noted in the market after the introduction of the second generation technology

commenting on the results: comparing with other studies

The experiments give a value for M close to the values obtained in the simulation

This last value is in good agreement with the results from on-site measurements

modal auxiliary verbs:

• can

• may

• could

• might

It seems that our experimental results can be explained by the consistent irregularities in signal strength 

The value differences may originate from magnetic variability

common verbs:

• may

• could

• appears

• seems

• is likely

From these preliminary results, it appears that the FGC process is the most cost-efficient of the three techniques. 

Therefore, investments in renewable energy sources may never be made on a sufficiently large scale

commenting on relationship between variables

common verbs:

• was correlated (negatively) with

• was associated with

• was (not) (significantly) related to

The tendency to fracture was correlated positively with the cooling time