Comparatives are formed in what two ways? by adding the ending -er or -est by adding both the word more and the ending -er by adding the ending -ed by using the words more or most before the word

from the political point of view it could be said that the candidate   is an effective speaker because she takes a strong position on the issue. it is an open discussion but probably she is making a presentation and can choose which subjects she wants to address. she is very likely to attain her aim which is to convince voters to accept her proposal.

by explaining that it took the same total time to travel by plane as it did by train