They have thought.
Present perfect - have/has thought. Past perfect - had thought. Future perfect - will have thought.
The perfect tense of "think" is "have thought." For example, "I have thought about it before."
The future perfect for "think" is "will have thought."
The present tense forms of to think are think - thinks
The plural present tense of "think" is "think." For example, "They think that it is a good idea."
The present perfect tense of think is:I/You/We/They have thought.He/She/It has thought.
Present perfect - have/has thought. Past perfect - had thought. Future perfect - will have thought.
i think it can be used in sentences
The present perfect form of "present" is "have/has presented."
The present perfect of follow is has/have followed.
On the beach..and gift chocolate as present for the girl.
The present perfect tense is Have/Has Hidden.
The present perfect tense is has/have existed.
have/has planned (PRESENT PERFECT)
The present perfect is 'I have sung'
The present perfect tense of "are" is "have been."
Has/have drawn is the present perfect of "draw".